F
FOOL - FOOLISHNESS

FOOL - adjectives (also see FOOLISH)
• BILLY-WHIFFLING playing the fool ...Bk1898 Eng. dial.
 
FOOL - nouns
• BOOBOLOGY the study of fools ...Bk1942 Amer. sl.
• DORK-FACTOR the number of fools ...1970s US campus sl.
• FEATHER IN THE CAP, A † the badge of a fool ...a1700
• FOOLOLOGY. the study of fools ...Bk1942 Amer. sl.
• JACKASSIFICATION n. the act of making a jackass or fool of ...1822 nonce word
• MOROLOGY the science that treats of fools ...1867 humorous
• NUTOLOGY the study of fools ...Bk1942 Amer. sl.
 
FOOL, FOOLISH - nouns, person
• AARDVARK a slow-witted person having a coarse or foolish appearance; an oaf; a fool ...1968 Amer. sl.
• A.B. fools as a group (Asshole Brigade) ...1980s sl.
• ACE a nickname for a foolish and ineffectual person ...1960s Amer. sl.
• ACROBAT a fool ...1950s W. Indies sl.
• ADDLE-BRAIN a stupid or half-witted fellow; a foolish bungler; a dullard ...1880
• ADDLE COVE a foolish man; an easy dupe ...Bk1898 Eng. dial.
• AH-AH a stupid person; a fool ...1928 Amer. dial.
• AIREDALE a fool; a worthless person; a pest ...1920s US sl.
• AIRHEAD a foolish person ...1972 sl., orig. & chiefly US
• AL a fool, a jester; a silly person ...1857 Eng. dial.
• ALEC a fool or simpleton ...1919 Aust. sl.
• ALECK a foolish person ...1944 Aust. sl.
• ALKITHOLE a foolish fellow ...1746 Eng. dial.
• ALKITOTLE a foolish fellow ...1746 Eng. dial.
• ALLYAUN a fool ...Irish sl.
• AMADAN a foolish person ...Irish sl.
• AMADAUN a foolish person ...Irish sl.
• AMATON a foolish person; one yielding to anger ...B1900 Sc.
• AMITAN a weak, foolish person ...Bk1911 Sc.
• AMOTH a big soft fool who would cry for nothing ...1878 Ireland
• ANIMAL a fool; an oaf; a stupid person ...L16
• APE a foolish person who imitates ...Bk1913-17 Amer. dial.
• APPLEHEAD. a fool ...1940s US sl.
• APPLE-JOHN a foolish and probably impotent old man ...L16 sl.
• APPLE-KNOCKER a fool ...1930s sl.
• APPLE-PICKER a fool, an unsophisticated person, a country person ...1910s US sl.
• ARBUCKLE a fool ...20C teen & high school sl.
• ARSE a fool; a despicable person ...1944 Aust. sl.
• ARSEHOLE a foolish or despicable person; an unpleasant person, usually male ...c1784
• ASS a foolish person ...1578
• ASS-HEAD a blockhead; a stupid person; a fool; an idiot ...Bk1898 Eng. dial.
• ASSHOLE a foolish or despicable person ...c1784 sl.
• ASSINEGER a fool, a simpleton, a stupid person ...Bk1898 Eng. dial.
• ASSINEGO a fool, a simpleton, a stupid person ...Bk1898 Eng. dial.
• ASSNEGER a fool, a simpleton, a stupid person ...Bk1898 Eng. dial.
• ATTWOOD a foolish fellow; a stupid person; a blockhead; a simpleton ...1894 Eng. dial.
• AUF a foolish person, a simpleton ...1750 Eng. dial.
• AWF a foolish person, a simpleton ...1750 Eng. dial.
• BAARIE a fool; one who has newly arrived at a township from the countryside ...1970s S. Afr. sl.
• BABBY-LAKER one who entertains foolish speculations ...Bk1898 Eng. dial.
• BACON-BRAINS a fool, a stupid clodhopper, a clownish blockhead ...a1634
• BAKEBRAIN (derogatory) someone with limited or damaged mental faculties; a fool, an idiot; a stupid person ...1949 US sl.
• BALLITRAUNT † a foolish person; a buffoon; used as a term of contempt ...1790 Eng. dial.
• BALLOON-BRAIN a fool, a simpleton ...1940s US sl.
• BALMY a fool, a simpleton; a soft, weak-minded person ...1887 Eng. dial.
• BARI a fool; one who has newly arrived at a township from the countryside ...1970s S. Afr. sl.
• BARM-HEAD a soft, foolish person ...1865 Eng. dial.
• BARMPOT a foolish person ...1951 Brit. sl., orig. N. Eng. dial.
• BARMY a fool, a simpleton ...1887 Eng. dial.
• BARNDOOR-SAVAGE a clodhopper; a foolish, awkward, or clumsy person ...Bk1898 Eng. dial.
• BARRY a fool; one who has newly arrived at a township from the countryside ...1970s S. Afr. sl.
• BAT a foolish, thoughtless person ...Bk1913-17 Amer. dial.
• BATIE-BUM † a lazy or inactive fellow; a simpleton, a fool; a useless bungler ...a1550 Sc.
• BATIE-BUMMIL † an inactive helpless fellow; a useless bungler; a simpleton; a fool...a1550 Sc.
• BATTERLASH a small-witted person; a foolish or gullible person ...1867 Eng. dial.
• BAUBLE † a childish or foolish person; a silly trifler ...a1606
• BAWCOCK a foolish person ...1795 Eng. dial.
• BEANHEAD a dull, stupid person; a fool; an oaf ...1919 Amer. sl.
• BEAR'S ASS a fool; an ignoramus ...1960s US college sl.
• BEE EFF a foolish person, a 'bloody fool' ...1925 sl., orig. Brit. services' usage
• BEEFHEAD a thickhead, a blockhead, a fool ...1775
• BEE-IN-THE-BONNET an eccentric; a flighty person; a foolish person ...1856 Sc. & Eng. dial.
• BEND a foolish, foppish fellow ...Bk1911 Sc.
• BERK a foolish person ...1936 sl., chiefly Brit.
• BERKELEY a foolish person ...1937 Brit. rhyming sl. for 'cunt' (Berkeley Hunt)
• BERKELEY HUNT a foolish person ...1937 Brit. rhyming sl. for 'cunt'
• BESOM-HEAD a foolish or stupid person; a blockhead ...1864
• BEZOM-HEAD a foolish, stupid person ...1889 Eng. dial.
• B.F. a foolish person, a 'bloody fool' ...1925 sl., orig. Brit. services' usage
• BIG BOY a foolish, reckless, devil-may-care young man; a loveable idiot ...1920s US Black sl.
• BILLY-MINAWKY a foolish or stupid fellow ...19C Eng. dial.
• BILLY-WHIFFLER a fool; a simpleton ...Bk1898 Eng. dial.
• BIRK a foolish person ...1936 sl., chiefly Brit.
• BLADDERSKATE a foolish, noisy talker ...Bk1911 Sc.
• BLEEDER a 'bloody fool' ...1890 sl.
• BLELLUM a foolish, talkative person; an idle chatterer ...1787 Sc.
• BLOB a foolish person ...1916 sl., chiefly Aust.
• BLOCKHEAD a foolish person ...1549
• BLUNNERBOAR a blundering fool ...Bk1911 Sc.
• BOGAN a fool, an idiot ...Aust. sl.
• BOINARD † a fool, a simpleton; a rogue, a rascal, a scoundrel, a low person; a term of reproach ...a1300
• BOOB a foolish person ...1907 sl.
• BOOBY a foolish person ...1599 sl.
• BOOFHEAD a fool; a very gullible person ...c1930 Aust. sl.
• BORN-HEAD a young precocious fellow; a very foolish person ...Bk1911 Sc.
• BOSTHOON a fool or blockhead ...1914 Irish sl.
• BOSTOON a fool or blockhead ...1914 Irish sl.
• BOZO a clumsy, clownish, or foolish fellow; an oaf; a rude or annoying person ...1916 Amer. sl.
• BUFFER a foolish old person ...1749 Brit. sl.
• BUFFLEHEAD a fool, a blockhead, a simpleton, a stupid person, a silly person, an ignoramus ...1659
• BURG a fool, an idiot; an unpleasant person ...1980s S. Afr.
• BURK a foolish person ...1936 sl., chiefly Brit.
• BURKE a foolish person ...1936 sl., chiefly Brit.
• BUTTERBRAIN a fool ...1975-78 Amer. sl.
• BUTTERED BUN a country fool; a rustic simpleton ...E18 sl.
• BUTTERHEAD a fool ...1963 US sl.
• BUTTHOLE a foolish or despicable person; an obnoxious person ...1962 Amer. sl.
• BUZZARD a foolish or despicable person; a contemptible old man ...1641
• CABBAGE-HEAD a fool; a soft-head; a stupid person ...1682 sl.
• CAKE a fool or dullard; a stupid fellow ...1785 Eng. dial. & sl.
• CAKEHEAD an idiot; a fool ...1998 UK sl.
• CAKEY a fool or dullard ...L18 sl.
• CAKUM a foolish person ...Bk1898 Eng. dial.
• CALF a fool, a simpleton; a stupid or loutish person; an awkward or silly boy or man; a meek, harmless person ...1553 sl.
• CALF-HEAD a foolish fellow ...Bk1898 Eng. dial.
• CALF'S HEAD a fool; a very stupid fellow ...L16 sl.
• CALONKUS a fool ...L19 Aust. sl.
• CANG † a fool ...a1225
• CANK † a fool ...a1225
• CARTOON a ridiculous person; a fool ...1927 Amer. sl.
• CATHEAD a fool ...1950s US sl.
• CEMENTHEAD a blockhead, a fool, a stupid person ...1949 Amer. sl.
• CHANG † a fool ...a1225
• CHANK † a fool ...a1225
• CHARLEY a foolish person ...1946 sl., chiefly Brit.
• CHARLIE a foolish person ...1946 sl., chiefly Brit.
• CHEESEHEAD a fool; a stupid person ...20C teen & high school sl.
• CHEESE MEISTER  a fool; a jerk ...20C teen & high school sl.
• CHERRY PICKER an ignorant rustic; a fool ...1929 US sl.
• CHICKENBRAIN a fool ...1922 US sl.
• CHICKEN'S HEAD a fool ...1960s US Black sl.
• CHIEF a general insult; a fool, a braggart ...1990s UK Black sl.
• CHOOCH a blockhead, a fool ...1971 Italian-American
• CHOWDAR a fool ...Bk1892 Anglo-Chinese
• CHOWDERBRAIN a fool, a stupid person ...1960 US sl.
• CHOWDERHEAD a stupid person, a fool, a blockhead; a muddle-headed person; a dunce ... 1682 sl.
• CHUCKLEHEAD a fool; a silly person; a stupid person ...1731
• CHUMP a fool; a soft-head; anyone gullible or easily taken in ..1682 sl.
• CHUMPIE a fool; anyone gullible or easily taken in ..L19 sl.
• CHUMP OF WOOD a fool; a soft-head ...Bk1891 sl.
• CLODPOLE a foolish person ...1601 Brit.
• CLODPOLL a foolish person ...1601 Brit.
• CLOT a fool; an oaf ...19C colloq.
• CLOT-HEAD a fool; an oaf ...19C colloq.
• CLOUTER-HEAD a foolish, stupid person; one deficient in understanding ...c1861 Eng. dial.
• CLUCK a stupid oaf; a fool ...20C US colloq.
• CLUNK a foolish person ...1942 US sl.
• COCK-A-LILTY a person talking or acting foolishly ...19C Eng. dial.
• COCKAMAMIE a foolish or ridiculous person ...1936 US sl.
• COCKAMAMY a foolish or ridiculous person ...1936 US sl.
• COCKAMANIE a foolish or ridiculous person ...1936 US sl.
• COCKAMANY a foolish or ridiculous person ...1936 US sl.
• COCKSCOMB a fool; a fop or dandy ...L16
• COD a fool ...L17 sl.
• CODFISH a fool ...L18 sl.
• COD'S-HEAD a stupid fellow, a fool, a blockhead; a dupe ...1566
• COD'S HEAD AND SHOULDERS a dupe; a fool ...19C sl.
• COOT a foolish or crotchety person, esp. one who is old ...colloq.
• COXCOMB a fool; a fop or dandy ...L16
• CRACKERJACK a fool, an oaf ...1970s US campus sl.
• CUTER a fool; a josh ...Bk1914 criminals' sl.
• D.A. a fool, an idiot (Dumb-Ass) ...1970s US campus sl.
• DACEHEAD a fool ...E19 sl.
• DAFF † one deficient in sense or in proper spirit; a simpleton, a fool; a coward ...c1325 obs. exc. N. Eng. dial.
• DAFFAM a fool, a silly person ...Bk1900 Eng. dial.
• DAFFY a fool, a silly person ...1867 Eng. dial.
• DAFT DORIS a foolish woman ...2000 UK sl.
• DAFT-HEAD an idiot, a fool ...1889 Eng. dial.
• DAFTIE a simpleton; a fool ...1868 Sc. & Eng. dial.
• DAFT WATTY a silly, awkward person; a foolish fellow; a blockhead ...1805 Eng. dial.
• DAMFOOL a damned fool ...c1880 colloq.
• DAMN-FOOL a damned fool ...19C colloq.
• DAMPHOOL a damned fool ...19C colloq.
• DAMPHOOLE a damned fool ...c1880 colloq.
• DAMPHULE a damned fool ...c1880 colloq.
• DAMWIT a fool ...1940s US sl.
• DAN a fool (Dumb-Ass Nigger) ...2000s US Black sl.
• DAPHNE a foolish woman ...1980s Aust. sl.
• DARB a fool ...1920s sl.
• DARK a fool; a dullard ...1960s US campus sl.
• DASIBERD † a stupid fellow, a fool, a dullard, a simpleton ... c1400
• DATE a foolish, silly, stupid, or weak person ...1914 UK sl.
• DAW † a silly, chattering person, a simpleton, a fool ...c1500 obs. exc. Eng. dial.
• DAWCOCK † a stupid, silly, awkward fellow, a simpleton, a fool ...1556 obs. exc. Eng. dial.
• DAWKIN a dull, stupid person, a simpleton, a fool ...1565 Eng. dial.
• DAWPATE † a silly fellow, a simpleton, a fool ...a1529
• DEADHEAD a fool; a stupid person ...1930s Black sl.
• DEAD ONE a fool ...L19 US sl.
• DICKEY-DIDO an idiot; a fool...19C Brit. sl.
• DICK-HEAD a foolish person ...1964 sl.
• DILBERRY a fool ...1952 NZ sl.
• DILL a fool ...1941 Aust. sl.
• DILLPOT a fool ...1941 Aust. rhyming sl. for 'twat'
• DILLYPOT a fool ...1941 Aust. rhyming sl. for 'twat'
• DIMELOW a fool, an idiot ...1900 UK sl.
• DIMWIT a slow-witted fool ...1921 US sl.
• DINDERHEAD a foolish person ...1867 Eng. dial.
• DINELO a fool, an idiot ...1900 UK sl.
• DINELOW a fool, an idiot ...1900 UK sl.
• DING-A-LING a fool; an oaf; an odd, giddy person who hears bells ...1935 US sl.
• DINGBAT a dull, stupid person; a fool; a silly or light-headed person ...1915  Amer. dial.
• DINGDONG a dull, stupid person; a fool; an oaf; a silly or light-headed person ...1929 Amer. sl.
• DINGLEBERRY a foolish person ...1924 sl., orig. US
• DINGLEBODY a foolish, simple person ...1957 US sl.
• DIP a foolish person ...1932 US sl.
• DIPSHIT a foolish person ...1962 US sl.
• DIPSTICK an inept fool; an idiot; a jerk; a stupid or contemptible person; an oaf ...1963 US sl.
• DIVVY a foolish person ...1989 Brit. sl.
• DIVY a foolish person ...1989 Brit. sl.
• DIZ a foolish person ...1963 US sl.
• DIZZ a foolish person ...1963 US sl.
• DIZZARD † a foolish, stupid, or silly fellow; an idiot, a blockhead; a weak-minded person ...1547 obs. or arch.
• DOBBIE a stupid fellow; a blockhead, a fool, a simpleton, a dolt; a childish old man, a dotard; an awkward fellow, a clown ...1677 Sc. & Eng. dial.
• DODDY-PATE † a stupid person, a blockhead, a fool, a dunce ...c1500 obs. exc. Eng. dial.
• DOES (taboo) a foolish or despicable person ...S. Afr. sl.
• DOITARD a simpleton, a fool, an idiot ...1860 Eng. dial.
• DOITY a fool, simpleton, idiot ...19C Eng. dial.
• DOLLYPOT an oaf; a fool ...1920s Aust. rhyming sl. for 'twat'
• DONKEY a foolish person ...Bk1913-17 Amer. dial.
• DOOBIE a dull, stupid fellow; a fool, a simpleton; a dunce ...19C Sc.
• DOODLE-BRAIN a general insult; a stupid person, a fool ...1990s Aust. teen sl.
• DOODLE-HEAD a general insult; a stupid person, a fool ...1990s Aust. teen sl.
• DOOF a fool, a simpleton, an oaf ...1970s US sl.
• DOOFUS an oaf, a fool ...M20 US sl.
• DOORKNOB a fool ...1930s sl.
• DOPE a foolish person ...1851 sl.
• DORK a foolish person ...1967 sl., chiefly US
• DORKUS a fool ...1979 US sl.
• DOTARD a weak-minded or foolish old person
• DOUGH-HEAD a fool ...Bk1905 Amer. dial.
• DRONGO a stupid, foolish, or incompetent person ...1941 Aust. & NZ sl.
• DROOP an ineffectual, incompetent, or languid person; a fool ...1932 US sl.
• DUCK EGG a fool ...2003 UK sl.
• DUFFER an incompetent person; a person of no ability; a foolish oaf; a bungler ...c1730 UK sl.
• DUMB-ASS a foolish person ...1958 US sl.
• DUMB-BELL a foolish person ...1918 sl., orig. US
• DUMB BUNNY a foolish person ...1921 sl., orig. US
• DUMB-BUTT a foolish person ...1973 US sl.
• DUMB CLUCK a stupid oaf; a person as stupid as a chicken; a fool ...1906 Aust. & US colloq.
• DUMB DORA a foolish woman or girl ...1922 sl.
• DUMB-DUMB a foolish person ...1937 sl., orig. Amer.
• DUMBFUCK a foolish person ...1949 US sl.
• DUMBHEAD a foolish person ...1887 sl., chiefly US
• DUMBKOPF a foolish person ...1809 sl., orig. US
• DUMBO a dolt, a fool; a large and stupid oaf ...1932 US sl.
• DUMBSHIT a foolish person ...1961 US sl.
• DUM-DUM a foolish person ...1937 sl., orig. Amer.
• DUMKOPF a foolish person ...1809 sl., orig. US
• DUMMKOPF a foolish person ...1809 sl., orig. US
• DUMMOCK a fool, a blockhead ...19C Eng. dial.
• DUMMY a foolish person ...1796 sl.
• DUNDERHEAD a fool; a soft-head ...Bk1891 sl.
• ECHOHEAD a foolish person, usually female ...1990s sl.
• ESEL a fool, a simpleton ...1910s S. Afr. sl.
• EZEL a fool, a simpleton ...1910s S. Afr. sl.
• FART a fool, an unpleasant person, often older than the speaker ...M18 sl.
• FART-ARSE a term of contempt; a fool; an incompetent ...1940s sl.
• FARTHOLE a contemptible person ; an obnoxious or foolish person ...1970 Amer. sl.
• FAT-BRAIN a fool, an idiot; often used affectionately as well as derogatorily ...L16 sl.
• FAT-HEAD a fool, an idiot; often used affectionately as well as derogatorily ...1842 sl.
• FEATHER-BRAIN a foolish, giddy person; a dull, stupid person; a silly, light-headed person ...1839
• FILBERT a foolish, eccentric, or crazy person ...1915 Amer. sl.
• FISH a person easily fooled; a fool, an oaf ...20C US sl.
• FISH IN THE POOL a fool ...1998 Brit. rhyming sl.
• FLAT a fool; a soft-head ...Bk1891 sl.
• FLAT-HEAD a foolish person ...1862 sl.
• FLAT TIRE a fool, an oaf; a worthless man ...E20 US sl.
• FLEAK (derogatory) a woman; a foolish or giddy woman ...E17 Brit. colloq.
• FLURT an insignificant person; a fool ...19C Eng. dial.
• FOOD FOR THE SQUIRRELS a stupid or foolish person ...Bk1974 Amer. sl.
• FOO-FOO a fool, a worthless person ...Bk1974 Amer. dial.
• FOOL KILLER a notional creature called upon to dispose of fools ...1853 US sl.
• FOOL-FOOL a simple-minded fool ...1994 Jamaica
• FOOLIO a fool; a social outcast ...1994 US sl.
• FOOZLE a man who is easily humbugged; a fool ...Bk1892 Amer. sl.
• FOPDOODLE † a silly, vain, empty person; a stupid or insignificant fellow; a fop, fool, simpleton ...E17
• FUCKWIT a foolish person ...1969 sl., orig. Aust.
• GABBERLOONEY one who talks too much, acts the fool ...20C Ireland sl.
• GABBY a fool ...L18 sl.
• GABES a foolish person, one who acts foolishly; a busybody ...Bk1900 Eng. dial.
• GABES-CHANY a foolish person, one who acts foolishly; a busybody ...Bk1900 Eng. dial.
• GABEY a fool ...L18 sl.
• GABY a stupid, foolish, or silly person; a blockhead, simpleton, fool, dunce ...1796 Eng. dial. & colloq.
• GADAHA a fool, an idiot ...20C W. Indies
• GADGIE a fool, an idiot ...1985 Sc. sl.
• GADSO a fool ...17C sl.
• GAG a fool, a laughingstock ...1840 US
• GAIBIE a stupid, foolish person; a blockhead, a simpleton, a fool, a lout ...1790 Sc.
• GAISLING † a foolish, inexperienced person; a term of disparagement to a child ...1819 Sc.
• GALAH a foolish person ...1938 Aust. sl.
• GALIMAVIS a fool, a stupid person ...1925 Sc.
• GALLOOT a man, esp. if hulking, stupid, boorish, foolish, clumsy, or otherwise objectionable; an awkward or uncouth person ...1818 UK
• GALLOWS-FOOL an arrant fool, one that deserves hanging ...1894 Eng. dial.
• GALOOT a man, esp. if hulking, stupid, boorish, foolish, clumsy, worthless or otherwise objectionable; a big, awkward or uncouth person ...1818 UK
• GAMALEERIE a foolish, clumsy person; an old dotard ...1880 Sc.
• GAMARAMUS † a fool, a nitwit ...1849 Sc.
• GAMAREERIE a foolish, clumsy person ...1880 Sc.
• GAMAWOW † a fool ...1825 Sc.
• GAME a fool, a simpleton, esp. a victim ...L17 sl.
• GAMERAMUS † a fool, a nitwit ...1849 Sc.
• GAMF a buffoon, a fool; an empty-headed fellow who makes a great deal of noisy mirth; a fool, or one who wishes to seem so ...1825 Sc.
• GAMFRAL a fool, a buffoon ...20C sl.
• GAMFREL † a fool; a forward, presumptuous person ...a1758 Sc.
• GAMFRIL a fool, a buffoon ...20C sl.
• GAMFUL a fool, a buffoon ...20C sl.
• GAMMEREERIE a foolish, clumsy person ...1880 Sc.
• GAMMERSTAGS a rude, wanton girl; an idle, loose girl; a foolish girl ...1788 Eng. dial.
• GAMMERSTANG a rude, wanton girl; an idle, loose girl; a foolish girl ...1788 Eng. dial.
• GAMMERSTEL a rude, wanton girl; an idle, loose girl; a foolish girl ...1788 Sc.
• GAMMY a fool ...L19 Aust. sl.
• GAMPH a fool, a buffoon ...20C sl.
• GAMPHREL a fool; a stupid or senseless fellow; a blockhead ...1728 Sc.
• GAMPHRELL a fool; a forward, presumptuous person ...1800 Sc.
• GANCH an awkward, silly fellow; a fool, a boor ...Bk1900 N. Ireland
• GANDER a dull or stupid person; a fool, a simpleton; a gawky person ...1553
• GAPIE a stupid, gaping, or irresponsible person; a fool ...1908 Sc.
• GAPPY a stupid, gaping, or irresponsible person; a fool ...1908 Sc.
• GAUNCH a fool, a boor ...20C Ulster sl.
• GAWBY a stupid, foolish person; a blockhead, a simpleton, a fool, a lout ...1790 Eng. dial.
• GAWK an awkward person; a fool; a simpleton ...1837
• GAWKY an awkward, clumsy, foolish person; a lout, a simpleton ...1724
• GAWM a foolish person ...1912 sl.
• GAWNICUS a fool, a dolt, a stupid fellow, an ignoramus, a simpleton ...1867 Amer. dial.
• GAWNY a stupid, awkward person; a foolish fellow; a simpleton ...1909 Amer. dial.
• GAZOB a foolish person ...1906 Aust. sl.
• GECK † a fool, a simpleton; one who is befooled or derided, a dupe ...1515 obs. exc. Eng. dial.
• GEEK † a fool, a simpleton; one who is befooled or derided, a dupe ...1515 obs. exc. Eng. dial.
• GEKE † a fool, a simpleton; one who is befooled or derided, a dupe ...1515 obs. exc. Eng. dial.
• GILLY a fool, a simpleton, an idiot ...1889 Amer. dial.
• GIMP a simpleton; a fool ...c1925 Aust. sl.
• GLOP a fool ...1864 Eng. dial.
• GNAW-POST a stupid, ignorant person; a silly fellow; a fool, a simpleton ...1856 Eng. dial.
• GO-ALONG a fool; a soft-head ...Bk1891 sl.
• GOAT a foolish person ...1916 sl.
• GOBALOON one who talks too much, acts the fool ...20C Ireland sl.
• GOBBERLOONY one who talks too much, acts the fool ...20C Ireland sl.
• GOBDAW a foolish person ...a1966 Anglo-Irish
• GOKY †* a fool, a simpleton ...1377
• GOM a foolish, awkward person; a simpleton; an idiot ...1996 Ireland
• GOMF a buffoon, a fool; an empty-headed fellow who makes a great deal of noisy mirth; a fool, or one who wishes to seem so ...1825 Sc.
• GONEY a stupid, awkward person; a foolish fellow; a simpleton ...1838 Amer. dial.
• GONK a fool; an idiot ...2003 UK teen sl.
• GONNER-HEAD a fool; a stupid fellow, a dunce ...1740 Eng. dial.
• GONNER-PATE a fool; a stupid fellow; a dunce ...Bk1900 Eng. dial.
• GONUS a fool, a dolt, a stupid fellow, an ignoramus, a simpleton ...1842 Amer. dial.
• GONY a stupid, awkward person; a foolish fellow; a simpleton ...1859 Amer. dial.
• GONZO a foolish person ...1977 sl., orig. & chiefly US
• GOOBER an idiot, a fool; an incompetent, a country bumpkin ...M19 sl.
• GOOBY a stupid, foolish person; a blockhead, a simpleton, a fool, a lout ...1790 Eng. dial.
• GOOF an oaf, a ridiculous jerk; an incompetent fool ...1916 US sl. & colloq.
• GOOF-BALL a jerk; an oaf; an incompetent fool ...1944 US sl.
• GOOFER an oaf, a ridiculous jerk; an incompetent fool ...20C US sl. & colloq.
• GOOFIE a fool ...1920s US campus sl.
• GOOFUS an oaf, a ridiculous jerk; an incompetent fool ...1917 US sl. & colloq.
• GOOFY a fool ...1920s US campus sl.
• GOOG a fool ...1910s sl.
• GOOGIE a fool ...1910s sl.
• GOO-GOO a silly fool ...1910s US sl.
• GOOGY a fool ...1910s sl.
• GOOK a dull, stupid, foolish person ...1910s sl., orig. US
• GOON a stupid, awkward person; a foolish fellow; a simpleton ...1921 sl., orig. US
• GOONEY a foolish or stupid fellow; a simpleton ...1815 Eng. & Amer. dial.
• GOONUS a fool, a dolt, a stupid fellow, an ignoramus, a simpleton ...1959 Amer. dial.
• GOONY a stupid, awkward person; a foolish fellow; a simpleton ...1948 Amer. dial.
• GOOP a foolish person ...1900 sl., orig. US
• GOOSECAP † a silly fellow; a stupid, foolish person; a simpleton; a giddy or flighty young girl ...1589 obs. exc. Eng. dial.
• GOOSTRUMNOODLE a stupid person; a fool ...1871 Eng. dial.
• GORBY a stupid, foolish person; a blockhead, a simpleton, a fool, a lout ...1790 Eng. dial.
• GORM a foolish person ...1912 sl.
• GOUK a dull, stupid, foolish person ...1910s sl., orig. US
• GOZZARD a fool, a simpleton ...B1900 Eng. dial.
• GREENLANDER a fool; a soft-head ...Bk1891 sl.
• GRIZZLEDEMUNDY a term of abuse applied to a person who laughs at any trifling thing; a grinning fool; a stupid oaf ...1818 Eng. dial.
• GROLL † a foolish or superficial person; a gossip, a smatterer ...1637
• GUBBINS a foolish person ...1916 Brit. sl.
• GUCK † a foolish saying; a fool ...1596 Sc.
• GULL-FINCH † a fool, a simpleton; a person easily deceived ...1630
• GULPIN one who will swallow anything; one easily gulled; a credulous simpleton; a fool ...1802
• GUMP a foolish person ...1722 sl., now US
• GUMPH a foolish person ...1722 sl., now US
• GUP a fool ...c1925 Aust. sl.
• GUPPY a fool ...c1925 Aust. sl.
• GUY a person who is an object of ridicule or derision; broadly, a fool ...1823 Amer. sl.
• HAIRBRAIN an oaf, a fool ...M16
• HAIRPIN a fool, a simpleton ...L19 US sl.
• HAIVEREL a foolishly chattering or garrulous person; a fool, a half-wit, a simpleton ...c1779 Sc.
• HAIVREL a stupid, half-witted person; a talkative, garrulous person; a fool ...1801 Sc.
• HAL a fool, a jester; a silly person ...1857 Eng. dial.
• HALF-BAKE a fool, an inadequate person ...1940s sl.
• HALF-BAKED a foolish fellow ...Bk1905 Eng. dial.
• HALF-CHAR a foolish fellow ...Bk1905 Eng. dial.
• HALFLIN a half-witted person; a fool ...1808 Sc. & Eng. dial.
• HALFLING a half-witted person; a fool ...1808 Sc. & Eng. dial.
• HALF-NATURAL a fool ...Bk1905 Eng. dial.
• HALF-ROCK a foolish or half-witted fellow ...1893 Eng. dial.
• HALF-THICK a foolish fellow ...1896 Eng. dial.
• HALFY a fool; a half-witted person ...Bk1905 Eng. dial.
• HALLACKING a foolish person ...1841 Eng. dial.
• HARE-BRAIN † one who has a brain like a hare's, or no more brain than a hare; a giddy, reckless or rash person; an oaf, a fool ...1550
• HASH one who talks nonsense; a fool; a scamp; also, a term of endearment for a boy ...1685 Sc. & Eng. dial.
• HAVERAL-HASH a silly, nonsensical person; a fool ...1870 Sc.
• HAVEREL a stupid, half-witted person; a talkative, garrulous person; a fool; one who talks without sense ...c1779 Sc. & Eng. dial.
• HAVERIL a stupid, half-witted person; a talkative, garrulous person; a fool ...1801 Sc.
• HAVREL a foolishly chattering or garrulous person; a fool, a stupid, half-witted person, a simpleton ...c1779 Sc.
• HAWBUCK an unmannerly lout; a country bumpkin or clown; a coarse, vulgar lad; a foolish or stupid fellow; a simpleton ...1805
• HAWFLIN a half-witted person; a fool ...1808 Sc. & Eng. dial.
• HAZE-BAZE a fool, a stupid person, a ninny ...1877 Ireland
• HEEPY † a fool, a stupid person ...1800 Sc.
• HICKJOP a fool ...B1900 Amer. American thieves' sl.
• HOBALL † a clown, a fool, a dolt, an idiot ...a1553
• HOBBY HORSE a fool, a jester ...L16 sl.
• HOB-GOB a fool, an idiot; an awkward, uncouth person ...B1900 Eng. dial.
• HODDY-DODDY † a foolish or ridiculous person; a simpleton; a dupe ...1646
• HODDY-NODDY †* a fool, simpleton, noodle ...1600
• HODDYPEAK † a fool, a simpleton, a blockhead ...1500
• HORSE MARINE a lubberly or clumsy fool; a dolt ...1823 US nautical & military usage
• ICK a fool, a gullible or easily deceived person ...1930s US Black sl.
• ICKAROO a fool, a gullible or easily deceived person ...1930s US Black sl.
• IG MAN an ignorant man; a fool ...20C US Black sl.
• IGNARO † one that is ignorant; a fool, a blockhead, a dunce, an ignoramus ...1620
• IGNO a fool ...1970s US sl.
• IMPLEMENT a fool easily engaged in any enterprise, though difficult or dangerous ...1690 sl.
• INCOMPOOT a nincompoop, a fool, a silly person, a trifler ...Bk1902 Eng. dial.
• INSIPIENT † an unwise, foolish or silly person ...1494
• IRONHEAD a stupid oaf, a fool ...20C sl.
• ISRAEL a fool, an idiot ...Bk1902 Eng. dial.
• IT-SHAY an oaf or a fool ...20C US Pig Latin for 'shit'
• J a fool, an oaf ...19C Brit. sl.
• JACK a fool ...L14 sl.
• JACK-ADAMS a foolish and stubborn person; a simpleton; a silly, impertinent fellow ...1690 sl.
• JACKALALLY a foolish person ...Bk1902 Eng. dial.
• JACK AND JILL. a fool ...1970s Aust. rhyming sl. for 'dill'
• JACKASS a stupid or foolish person; a dolt, an oaf, a blockhead ...1823
• JACK-FOOL a great fool ...1383 sl.
• JACK LANTERN a fool; a dull, stupid fellow ...1896 Amer. dial.
• JACOB † a simpleton; a fool; a half-witted fellow; an oaf ...1785 sl.
• JARHEAD (derogatory) a dull, stupid person; a fool, an oaf ...1969 Amer. dial.
• JAR-HEAD a fool, an oaf ...20C US sl.
• JAZZBO a clumsy, clownish or foolish person; an oaf; a rude or annoying person ...1923 Amer. sl.
• JEEP a foolish, inexperienced, or offensive individual ...1938 Amer. sl.
• JERK an oaf or incompetent fool ...19C US sl.
• JOBARD † a stupid fellow; a fool ...a1400
• JOBBERNOWL a stupid, thick-headed person; a blockhead, a fool, a dunce, a dolt ...1592 colloq.
• JOE ERK a fool; an oaf; a jerk; a wretched man ...World Wars rhyming sl. for 'jerk' and 'berk'
• JOE HUNT a fool; an oaf; a jerk; a wretched man ...20C Brit. rhyming sl. for 'cunt'
• JOLTERHEAD a fool; a stupid person ...L18 sl.
• JOLTHEAD a fool; a stupid person ...L18 sl.
• JUGGINS a dolt; a fool; a soft-head; gullible person; a dupe ...1682
• KANG † a fool ...a1225
• KIME †* a simpleton, a fool, a silly fellow...c1305
• KLUCK a stupid oaf; a fool ...20C US colloq.
• KNOCK-SOFTLY a silly or stupid person; a fool ...1887 Eng. dial.
• KNOW-NOTHING one who knows nothing; an ignorant person; a fool ...1839
• LABBET a fool ...Bk1902 Eng. dial.
• LABRICK a fool; a dolt; an idiot; a dull, stupid person; a greenhorn; a stranger; a naive or foolish person; often used as a mild term of abuse ...1889 Amer. sl.
• LACK-BRAIN one who is destitute of sense or brains; one wanting in wit; a stupid, empty-headed fellow, a fool ...1596
• LALDRUM a simpleton; a complete fool ...Bk1902 Eng. dial.
• LAMB a simpleton, a fool, esp. one easily cheated of their money ...1668
• LAME a person who is 'lame'; a fool, an idiot; an unsophisticated person; one who does not fir in with a particular social group  ...1958 US sl., chiefly Black usage
• LAMEBRAIN a fool, an idiot ...1919 US sl.
• LAME-O a fool; an idiot; an unsophisticated person ...1977 US college sl.
• LAMER a person who is 'lame'; a fool, an idiot; an unsophisticated person ...1961 US sl.
• LAMESTER a foolish or contemptible person ...1978 US sl.
• LANE a person easily imposed upon or cheated; a victim; also, one who is foolish or socially unsophisticated ...1933 US sl., esp. Black & criminals' usage
• LARRY a fool ...20C Irish sl.
• LAVERICK a fool; a dolt; an idiot; a dull, stupid person; a greenhorn; a naive person; a stranger; often used as a mild term of abuse ...1895 Amer. dial.
• LEATHER-EARS a stupid person; a fool; one slow of comprehension ...1903 Amer. dial.
• LEATHER-HEAD a fool, a blockhead, a dolt, an oaf, a stupid person; a person slow of comprehension ...a1700
• LEATHER-NECK a stupid person; a fool; a blockhead; an uncouth person ...1919 Amer. dial.
• LEMON a victim; a fool ...1908 sl.
• LIGHTS a fool; a soft-head; an oaf ...1682 Brit. colloq.
• LINTBRAIN a foolish, dim-witted, or ignorant person ...1990 US sl.
• LINTHEAD a foolish, dim-witted, or ignorant person ...1960 US sl.
• LOBCOCK † a country bumpkin; a clown, a lout, a boor; a dull, stupid, sluggish person; a clumsy, lubberly fellow; a blundering fool; a blockhead; a term of abuse ...a1553 obs. exc. Eng. dial.
• LOGGERHEAD a fool; a dullard ...L16 sl.
• LOMMIX a large, heavy, or clumsy person; an ungainly or stupid lout; a fool ...M19 sl.
• LOOB a fool, a dullard ...M14 Eng. dial.
• LOOBY a fool; a soft-head ...Bk1891 sl.
• LOOGAN a foolish person ...1929 US sl.
• LOONY a fool; a soft-head ...Bk1891 sl.
• LOOP a fool ...1940s Aust. sl.
• LOX a fool; a lummox ...1966 Amer. sl.
• LOX-FOR-BRAINS a fool ...1977 Amer. sl.
• LUB a fool ...M14 sl.
• LUBBER a fool; a soft-head ...M14 sl.
• LUMMIX a large, heavy, or clumsy person; an ungainly or stupid lout; a fool ...M19 sl.
• LUMMOCK(S) a large, heavy, or clumsy person; an ungainly or stupid lout; a fool ...M19 sl.
• LUMMOKIN a large, heavy, or clumsy person; an ungainly or stupid lout; a fool ...M19 sl.
• LUMMOX a large, heavy, or clumsy person; an ungainly or stupid lout; a fool ...M19 sl.
• LUMMUX a large, heavy, or clumsy person; an ungainly or stupid lout; a fool ...M19 sl.
• LUSH a victim or fool ...1940s US sl.
• MACARONI a merry fool, esp. if an Italian ...1711 colloq.
• MACKEREL a worthless, stupid or foolish fellow ...1863 Amer. sl.
• MACKEREL AND SPRAT a fool ...1998 Brit. rhyming sl. for 'prat'
• MACKY-MOON a fool, a silly person; one who makes himself absurd or ridiculous by playing the fool; a queer-looking figure ...1872 Eng. dial.
• MACO a fool, an idiot ...20C W. Indies sl.
• MADDLIN(G) a fool, simpleton, blockhead ...Bk1905 Eng. dial.
• MAD HADDOCK a very eccentric, crazy, or foolish person ...20C Aust. sl.
• MADLING a mad creature; one who acts wildly or foolishly ...c1648-50
• MAFF a fool; a foolish, silly person ...Bk1905 Eng, dial.
• MAFFLARD † a stammering or blundering fool; a term of contempt ...c1450
• MAFFLIN a simpleton; a silly, foolish person ...Bk1905 Eng, dial.
• MAGHNOON a fool; a dolt; an idiot ...L19 among troops in Egypt
• MAGOO a useless or foolish person; an absent-minded or inattentive person ...1932 Amer. sl.
• MAGUFFIN a foolish, blundering person, an oaf ...1832 Sc.
• MAISLIN a fool, a simpleton, an idiot ...1781 Eng. dial.
• MAISLYKIN a fool, a simpleton, an idiot ...1781 Eng. dial.
• MAKIN a fool, a simpleton ...Bk1905 Eng. dial.
• MAKO a fool, an idiot ...20C W. Indies sl.
• MALLETHEAD a fool, a stupid person, a numbskull ...1954 US sl.
• MAMELT a simpleton, a fool ...1790 Eng. dial.
• MAMMELT a simpleton, a fool ...1790 Eng. dial.
• MAMMY-GOG a foolish, stupid person ...1884 Eng. dial.
• MAMMY-SUCK a foolish, stupid person ...Bk1905 Eng. dial.
• MAN IN THE MOON a fool, an eccentric or crazy person ...20C rhyming sl. for 'loon'
• MANMANPOUL a gullible fool ...20C W. Indies sl.
• MARLOCK one who plays pranks; a fool ...1790 Eng. dial.
• MAROON an obnoxious or foolish person; a stupid person  ...1941 Amer. sl.
• MATHUM a fool, a stupid person; a blockhead ...Bk1905 Eng. dial.
• MAWKS a foolish, slatternly woman; an overgrown, clumsy girl ...1721 Eng. dial.
• MAY-GAME a foolish, silly person ...1886 Eng. dial.
• MAZED-ANTIC a wild, foolish, crazy person ...Bk1905 Eng. dial.
• MAZICAN a stupid person; a fool ...Bk1905 Eng. dial.
• MAZLEKIN a fool, a simpleton, an idiot ...1781 Eng. dial.
• MAZLIN a fool, a simpleton, an idiot ...1781 Eng. dial.
• MAZY-JACK a fool, an idiot; a parish fool ...1876 Eng. dial.
• MCFLY a fool; an empty-headed person ...1980s US campus sl.
• MEATHUM a fool, a stupid person; a blockhead ...Bk1905 Eng. dial.
• MEE-MAW a simpleton, a fool ...1895 Eng. dial.
• MENTAL GIANT a fool, an idiot ...1980s US campus sl.
• MENTAL HERNIA a fool; an idiot; an oaf; a stupid person ...1970 Amer. sl.
• MESS an objectionable or foolish person; unruly or incorrigible person; an oaf; a hopelessly stupid person; a mentally confused person ...1936 sl.
• MOKE a stupid fellow, a dolt, a blockhead; a foolish or inconsequential fellow ...1855 Eng. dial. & sl.
• MOKES a foolish or inconsequential fellow; a stupid fellow ...1985 Amer. sl.
• MOLLY-BOOBY a foolish person ...1965 Barbados sl.
• MOOK an ineffectual, foolish, or contemptible person ...1930 US sl.
• MOO-MOO a fool, a simpleton ...20C W. Indies sl.
• MOONCALF a fool, a simpleton, an idiot ...1620
• MOONEY a fool; a soft-head ...Bk1891 sl.
• MOONHEAD an oaf, a fool ...E20 US colloq.
• MOONLING † a simpleton, a silly fellow, a fool, an idiot, a lunatic ...1616
• MOP a fool; an oaf ...14C sl.
• MOPE a fool; a dolt; an oaf; a dullard ...E17
• MOPSTICK a fool or an idiot ...sl.
• MOREPORK a 'dull dog'; a fool ...c1840 Aust. colloq.
• MOREPORK KIND OF A FELLOW a 'dull dog'; a fool ...c1840 Aust. colloq.
• MOROSOPH one who is 'foolishly wise'; a philosophical or learned fool; one learned but lacking common sense ...1751
• MOTORHEAD a fool ...1973 US sl.
• MOUSEBRAIN a fool, a birdbrain ...1914 Amer. sl.
• MOUTH BREATHER a fool ...1986 UK sl.
• MR. NAWPOST a foolish fellow ...c1696 sl.
• MUD a fool; an oaf; a stupid person ...18C Brit. colloq.
• MUDDING-FACE a fool; a weakling ...L19 sl.
• MUDDLE-HEAD a fool; a simpleton; a stupid person; an oaf  ...M19
• MUD-HEAD an oaf; a fool; a stupid person ...E19 colloq.
• MUFF an oaf, a fool, a stupid person ...1682 cant
• MUFFIN a fool ...1830 Brit. sl.
• MUFFIN-CAP a fool ...M19 sl.
• MUG a fool; a soft-head ...Bk1891 sl.
• MUGGINS a foolish person ...1855 sl.
• MUGGY-CUNT a fool ...2000 UK sl.
• MUG LAIR a showy but foolish person ...1944 Aust. sl.
• MULLETHEAD a fool, a stupid person ...1857 US sl.
• MUMMYDIDDLE a stupid, silly person; a foolish person ...Bk1903 Eng. dial.
• MUMMYHEAD a fool ...1990s US Black gang usage
• MUSH a fool ...20C US sl.
• MUSH-FACE a fool; a sentimental idiot ...1920s sl.
• MUTANT a clumsy, foolish, or otherwise unpopular individual; generally used by adolescents ...sl.
• NABALL a fool ...1612 sl.
• NAF a fool; a weakling; an ineffectual person ...1960s S. Afr. sl.
• NAILHEAD a dull, stupid person; a fool ...1948 Amer. sl.
• NANA a foolish person ...1941 sl., orig. Aust.
• NANNICOCK †* a silly, affected person; a young woman, as a term of contempt; also, a fool ...1600
• NANNY-CRATTY an inquisitive, meddlesome, foolish, weak-minded person ...Bk1905 Eng. dial.
• NANNY-GOAT a foolish girl or woman ...1900 Eng. dial.
• NANNY-HAMMER a foolish person ...1881 Eng. dial.
• NARNA a fool, an idiot, an incompetent ...1960s sl.
• NATURAL FOOL one who is by nature deficient in intelligence; a fool or simpleton by birth ...c1430
• NATURAL IDIOT † one who is by nature deficient in intelligence; a fool or simpleton by birth ...1540
• NAUMPEY a weak, foolish-minded person ...Bk1905 Eng. dial.
• NAZOLD a silly or weak-minded person; a vain fool ...1607 colloq.
• NAZZARD an insignificant or feeble person; a worthless scamp; a silly, foolish fellow ...1619 obs. exc. Eng. dial.
• NEDDY a fool, a simpleton ...1793 Sc. & Eng. dial.
• NENA a fool, an idiot, a ninny ...1870 Eng. dial.
• NERK a fool; a generally unacceptable person ...1950s sl.
• NERVOUS NELLIE a fearful, foolish, and timid person ...1920s US sl.
• NERVOUS NELLY a fearful, foolish, and timid person ...1920s US sl.
• NIB a fool ...Bk1902 printers' sl.
• NICKIN a fool, a simpleton ...L17 sl.
• NICK-NINNY † a simpleton, an empty fellow, a fool ...c1696 sl. or Eng. dial.
• NICKUMPOOP a fool; an oaf; a jerk ...L17 sl.
• NIDDICOCK †* a fool, a simpleton, a ninny ...1586
• NIDDIPOL a fool ...1583 sl.
• NIDDLETY-NOD a foolish person ...B1900 Eng. dial.
• NIDDY-NODDY a fool, idiot, or simpleton ...1889 Eng. dial.
• NIGGET † a fool, simpleton, idiot ...B1900
• NIG-NOG a foolish person ...1953 Brit. sl.
• NIKEY a fool, a simpleton ...L17 sl.
• NIKIN a fool, a simpleton ...L17 sl.
• NIMSHI a conceited fellow; a foolish fellow; a nincompoop; one who habitually acts in a foolish manner; a mischievous child  ...1848 Amer. dial.
• NIMSHY a blockhead; a foolish fellow; a mischievous child ...1848 Amer. dial.
• NINCOMPOOP a foolish person ...1676
• NING-NANG a worthless or troublesome person; an unreliable person; a silly or stupid person; a fool ...1832 Eng. dial.
• NING-NONG a foolish person ...1957 Aust. sl.
• NINKOMPOOP a fool; an oaf; a jerk ...L17 sl.
• NINNY a fool; an oaf; a simpleton ...1533
• NINNYHAMMER a stupid or weak-minded person; a simpleton, a fool ...1592
• NINNY-NONNY a silly, weak, or foolish person ...1876 Eng. dial.
• NINNY-WHOOP †* a fool, a simpleton, a ninny ...1653
• NISEY † a fool; a silly fellow; a simpleton; a dunce ...c1684-6
• NIT a nitwit; an oaf; a fool ...1588 colloq.
• NITWIT a simpleton, a moron, a fool ...1914 US sl.
• NIZY a fool; a dunce ...L17 sl.
• NIZZIE a fool; a dunce; a soft-head ...L17 sl.
• NOCKY † a silly, dull fellow; a foolish person; a simpleton, a dullard; an oaf ...a1700 obs. rare exc. Eng. dial.
• NOCKY BOY a dull oaf; a fool ...17C colloq.
• NODCOCK a simpleton; a fool; an oaf ...M16
• NODDIPOL an oaf; a fool ...16C colloq.        
• NODDY an oaf; a fool; a simpleton ...16C colloq.
• NODDY-HEAD an oaf; a fool; a simpleton ...16C colloq.
• NODDY-PATE a simpleton, an idiot, a fool, an oaf ...1660
• NODDY-PEAK(E) an oaf; a fool; a simpleton ...16C colloq.
• NODDY-POLE an oaf; a fool; a simpleton ...16C colloq.
• NODDY-POLL an oaf; a fool; a simpleton ...16C colloq.
• NODGECOCK a simpleton; a fool; an oaf ...M16
• NOGGY a young fool, a blockhead ...B1900 Eng. dial.
• NOKES †* a fool, a simpleton, a ninny ...a1700
• NONG an oaf; a dolt; a stupid person; a fool; an idiot ...1944 Aust. sl.
• NONG-NONG a foolish person ...1944 Aust. sl.
• NOODLE a foolish person ...1753 sl.
• NULLY a foolish person ...1973 sl.
• NUMB CREATURE a fool, a stupid person ...1941 Amer. dial.
• NUMBHEAD a fool, a stupid person ...1941 Amer. dial.
• NUMB NUT a fool, a stupid person ...1966 sl.
• NUMBSKULL a fool; a blockhead; a dull-witted person; a dunce; a dolt; a stupid fellow ...1742
• NUMBY a fool, a stupid person ...1966 Amer. dial.
• NUM-CUMPUS one who is non compos mentis, or not of sound mind; a fool ...1882 Eng. dial.
• NUMP a dolt; an oaf; a silly or stupid person; a fool; a blockhead ...17C Brit.
• NUMPS † a silly or stupid person; a fool, a blockhead, a dolt ...1611 obs. exc. Eng. dial.
• NUMPTY a fool; an idiot ...Brit. sl.
• NUMPY a fool, a dolt ...1941 Amer. dial.
• NUMSKULL a fool; a blockhead; a dull-witted person; a dunce; a dolt; a stupid fellow ...1742
• NUPSON † a simpleton, a fool ...1598
• NUT a crazy or insane person; an eccentric; a foolish person ...1908 sl.
• NUTHATCH a madman; a fool ...1972 Amer. sl.
• NUTHOUSE a fool ...1926 Amer. sl.
• OAFO an oaf; a socially inferior fool; a lout ...1959 UK sl.
• OANSHACH a foolish person, an idiot ...1950 Sc.
• OASHACH a foolish person, an idiot ...1950 Sc.
• OHMADAUN a fool ...M19 Ireland
• OINSEACH a female fool ...2001 Irish sl.
• OLD BAT a disagreeable, middle-aged or elderly woman; an unpleasant or despicable female; an unattractive or foolish old woman ...1886 UK sl.
• OLD BUFFER a foolish old person ...1749 Brit. sl.
• OLD COOT a foolish or cantankerous old person; also used affectionately ...M18 sl.
• OLD FART a fool, an unpleasant person, older than the speaker ...M18 sl.
• OMADAUN a stupid person; a simpleton, a fool; a lazy, good-for-nothing fellow ...1843 Ireland
• OMADAWN a fool ...M19 Ireland
• OMADHAUN a fool, a simpleton; a dull, stupid person; a term of abuse ...1818 Ireland
• ONE a fool, a dupe ...1980s sl.
• OONCHOOK a foolish person ...1937 Irish & Can.
• OONSHIK a foolish person ...1937 Irish & Can.
• OONSHUGH a foolish woman ...Bk1905 Ireland
• OYSTER an odd, stupid, or foolish person ...1930s US sl.
• PAISAN a fool ...1950s sl.
• PAISANO a fool ...1950s sl.
• PAMPOEN a fool ...1940s S. Afr. sl.
• PANHANDLE a fool; an unpleasant person ...1990s sl.
• PANTALOON † a term of contempt applied to an enfeebled, tottering old man; a dotard, an old fool ...1596-1600
• PANWIT a fool ...1990s UK juvenile sl.
• PAPER HAT a fool ...1960s rhyming sl. for 'prat'
• PAPER SCULL a fool ...L17 sl.
• PAPER SKULL a fool ...L17 sl.
• PAPES a foolish youth ...Bk1905 Eng. dial.
• PAPPYSHOW a fool, or someone who presents the appearance of a fool; one who makes a stupid exhibition of themselves ...1940 Trinidad and Tobago
• PATTICK a fool, simpleton, a silly person; one who talks nonsense; a merry fellow ...1856 Eng. dial.
• PEA-BRAIN a foolish or unintelligent person (informal)
• PIE-FACE a foolish person ...1922 US sl.
• PIGEON a fool; a soft-head ...Bk1891 sl.
• PIG-SCONCE a pig-headed fellow, a blockhead, a fool, a dullard ...1631
• PILLOCK a foolish man ...1967 Brit. sl.
• PISS-HEAD an oaf; a fool; a jerk ...20C US sl.
• PLONKER a foolish person ...1966 Brit. sl.
• POGGLE † a crazy or foolish person; an idiot ...E19 Indian now rare or obs.
• POON a foolish person ...1940 sl., chiefly Aust.
• POOP a foolish person ...1915 sl.
• POPPY SHOW foolishness, showing off; one who makes a stupid exhibition of themselves ...L19 W. Indies
• PORK a fool ...1970s sl.
• POTATO-HEAD a dunce; an oaf; a fool ...M20 US sl.
• PRAT a foolish person ...1968 Brit. sl.
• PRAWN a foolish person ...1893 sl., chiefly Aust.
• PRIZE PACKAGE a fool ...1920s US sl.
• PRONK a foolish person ...1959 sl.
• PROPER CHARLIE, A a foolish person ...1946 sl., chiefly Brit.
• PROPER CHARLEY, A a complete fool ...c1960 sl.
• PUDDEN a fool ...Brit. sl.
• PUDDING a fool ...Brit. sl.
• PUGGLE a crazy or foolish person; an idiot ...E19 Indian now rare or obs.
• PUMBLECHOOK a stupid person; a fool; an oaf; a 'human ass' ...L19 Brit. & US sl.
• PUPPY SHOW foolishness, showing off; one who makes a stupid exhibition of themselves ...L19 W. Indies
• PUTTY-HEAD a fool; a stupid person ...1905 Amer. dial.
• PUTZ a foolish, clumsy, or unfortunate person ...1964 Amer. sl.  
• QUASHIBA a foolish, uncultivated woman ...1940s W. Indies sl.
• QUEER a fool, a simpleton ...1950s Aust. sl.
• QUEER CULL a foolish dandy, a fop ...L17 sl.
• QUILT a fool, someone who acts against their own interests ...20C Irish sl.
• QUIMMO a fool; an unpleasant person ...1999 UK sl.
• QUINCE a weakling; a fool ...20C Aust. & US sl.
• RADGEPOT an idiot; a fool ...1979 UK sl.
• RAFFLE-TOPPIN(G) a wild, reckless, foolish person ...Bk19C Eng. dial.
• RAG a fool ...1960s sl.
• RAISIN-BRAIN a fool; a term of abuse ...1990s US Black sl.
• RALPH a fool; an oaf ...18C colloq.
• RALPH-SPOONER a fool ...L17 Eng. dial.
• RAWNY a silly fellow; a fool ...B1900 Eng. dial.
• RIGHT CHARLEY, A a complete fool ...c1960 sl.
• RIGHT CHARLIE, A a foolish person ...1946 sl., chiefly Brit.
• RIGHT NANA a fool, an idiot, an incompetent ...1960s sl.
• RODNEY a fool ...M19 Eng. dial. & colloq.
• RUMMY a foolish person; a weak-minded person ...1912 US sl.
• S.A.B. a Social Airhead Bitch ...1980s US college sl.
• SADDLE-GOOSE † a nickname for a fool ...1526
• SAINT-AGNES TÔTLE a stupid old fool ...Bk1904 Eng. dial.
• SAM a fool, a simpleton ...M19 sl.
• SAM-DINGLE a term of contempt for a fool; a simpleton ...Bk1904 Eng. dial.
• SAMMY a simpleton, a fool; an ill-natured fellow; an effeminate weakling; a lunatic ...1876 Eng. dial.
• SAMMY BILLY a simpleton; a foolish, stupid person ...Bk1904 Eng. dial.
• SAMMY CODLIN a simpleton; a foolish, stupid person ...1889 Eng. dial.
• SAMMY DAWKIN a simpleton; a foolish, stupid person ...1879 Eng. dial.
• SAMMY DINGLE a simpleton; a foolish, stupid person ...Bk1904 Eng. dial.
• SAMMY-HEAD a simpleton; a foolish, stupid person ...Bk1904 Eng. dial.
• SAMMY NODDY a simpleton; a foolish, stupid person ...Bk1904 Eng. dial.
• SAMMY SOFT a fool; an oaf ...c1840 sl.
• SAMMY SUCK-EGG a simpleton; a foolish, stupid person ...Bk1904 Eng. dial.
• SAP a simpleton; a blockhead; a fool ...1817 Sc. & Eng. dial.
• SAP-CRUST a fool; a blockhead ...1899 Sc.
• SAP-HEAD a fool; a simpleton; a stupid person; a blockhead ...1828
• SAPOLIO a fool, a dupe ...19C sl.
• SAP-PATE † a fool, a simpleton ...a1700
• SAPPER a fool, a dupe ...19C sl.
• SAPPO a fool, a dupe ...19C sl.
• SAPPY a fool; a blockhead ...1868 Eng. dial.
• SAPPYHEAD a fool ...M19 sl.
• SAP-SCAUP a simpleton; a fool; a blockhead ...Bk1904 Eng. dial.
• SAPSCULL a fool ...M18 sl.
• SAPSKULL † a silly fellow, a fool, a blockhead, a simpleton ...1735 obs. exc. Eng. dial.
• SAP-TOPPIN a simpleton; a fool; a blockhead ...Bk1904 Eng. dial.
• SART-AND-FAIR a foolish, weak person; one easily imposed upon ...1777 Eng. dial.
• SART-POLL a foolish, weak person; one easily imposed upon; a good-for-nothing fellow ...1867 Eng dial.
• SATEPOLL a foolish, silly, or stupid person; a simpleton ...1867 Eng. dial.
• SAUSAGE someone foolish or gullible; used as a gently reproving term of address ...1982 UK sl.
• SAWN a foolish person ...1953 Aust. sl.
• SAWNEY a simpleton, a fool, a stupid fellow; a soft, good-natured fellow ...a1700 colloq.
• SAWNY a foolish or indolent person ...L17 sl.
• SCART a saving, industrious person; a niggard; a villain; a fool ...1895 Sc. & Eng. dial.
• SCHLEMASEL a fool, esp. an unfortunate, an incompetent ...L19 sl.
• SCHLEMAZEL a fool, esp. an unfortunate, an incompetent ...L19 sl.
• SCHLEMBO a fool ...2000s sl.
• SCHLEMIEL a fool; a clumsy person; a gullible person; an ineffectual or incompetent person ...1892 sl., chiefly US
• SCHLEMIHL a fool; a clumsy person; a gullible person ...M19 sl.
• SCHLEP a foolish person ...1939 sl., chiefly US
• SCHLEPP a foolish person ...1939 sl., chiefly US
• SCHLEPPER a foolish person ...1954 sl., chiefly US
• SCHLOOMP a foolish person ...1948 sl., orig. & chiefly US
• SCHLUB an oaf or dolt; a fool ...1964 US sl.
• SCHLUCK a clumsy, uncoordinated fool ...Brit. sl.
• SCHLUMP a foolish person ...1948 sl., orig. & chiefly US
• SCHMENDRIK a foolish person ...1944 US sl.
• SCHMO a foolish person ...1948 sl., chiefly US
• SCHMOCK a stupid person; a fool; oaf; ...20C US sl.
• SCHMUCK a foolish person ...1892 sl., chiefly US
• SCISSOR one regarded as foolish, incompetent, or inexperienced ...1916 Amer. dial.
• SCISSORS-BILL one regarded as foolish; an ineffectual, incompetent, or inexperienced  person ...1871 sl., chiefly US
• SCIZZOR-BILL one regarded as foolish, incompetent, or inexperienced ...1940 Amer. dial.
• SCRUB a fool, a stupid person, a dumb individual ...1980s US Black sl.
• SEMOLIA a fool; a stupid person ...1890s US Black sl.
• SHALLOW-PATE a person having no depth of intellect or understanding; a foolish or empty-headed person
• SHEEPSHEAD † a foolish or stupid person
• SHITTY-WATTY a weak-headed, foolish person ...B1900 Eng. dial.
• SHLEMIEL a fool; a clumsy person; a gullible person ...M19 sl.
• SHLEMOZZLE a fool, esp. an unfortunate, an incompetent ...L19 sl.
• SHLEP a foolish person ...1939 sl., chiefly US
• SHLEPPER a foolish person ...1954 sl., chiefly US
• SHLUB a foolish person ...1964 US sl.
• SHLUMP a foolish person ...1948 sl., orig. & chiefly US
• SHMENDRIK a foolish person ...1944 US sl.
• SHLUCK a clumsy, uncoordinated fool ...Brit. sl.
• SHMO a foolish person ...1948 sl., chiefly US
• SHMOCK a fool ...Brit. sl.
• SHMUCK a foolish person ...1892 sl., chiefly US
• SHOON a fool; a bumpkin; a lout ...19C cant
• SIDE-SIM a fool; a simpleton ...E17 sl.
• SILLIKEN a fool, a simpleton ...M19
• SILLIKIN a fool, a simpleton ...1860 sl.
• SILLY a silly or foolish person ...1858 colloq.
• SILLY-ARSE a fool ...1990s Aust. sl.
• SILLY ASS a foolish or stupid person
• SILLY BILLY a fool, a simpleton ...1834 sl.
• SILLY BOLLOCK(S) a contemptible fool; an idiot ...1999 UK sl.
• SILLY CUNT a fool ...2000 UK sl.
• SILLY LEGS a term of mild abuse aimed at someone behaving like a fool ...Brit. sl.
• SILLYPOP a fool; a foolish, flighty woman ...L19 sl.
• SILLY WILLY a fool; a simpleton ...M17 sl.
• SIM a fool; a simpleton; a confidence trickster's dupe ...20C Aust. criminals' sl.
• SIMKIN * a fool; a simpleton ...a1700
• SIMON a fool; a soft-head ...Bk1891 sl.
• SIMP a fool, a simpleton, an oaf, a stupid or dull person; a dim-witted or backward person ...c1910 sl., orig.
• SIMPKIN a fool; a simpleton ...1861 rare
• SIMPLE an ignorant or foolish person ...1643
• SIMPLER a simple or foolish man much given to lust ...L16 sl.
• SIMPLE SIMON a silly fellow; a credulous gullible person; a fool, a simpleton ...1785 sl.
• SINGLE-TEN a very foolish, silly fellow ...a1700 sl.
• SIZZER one regarded as foolish, incompetent, or inexperienced ...1932 Amer. dial.
• SKEEZIX a fool ...1975 US sl.
• SKITTER-WIT a flighty person; a foolish, harebrained fellow; a scatterbrain ...1886 Eng. dial.
• SKITWIT a soft, foolish, scatterbrained person ...B1900 Eng. dial.
• SLOW-COACH a fool; a soft-head ...Bk1891 sl.
• SNORKER a contemptible fool ...1977 US sl.
• SOAP a fool, a simpleton ...1950s Aust. sl.
• SOFT-HORN a fool; a soft-head ...Bk1891 sl.
• SOFTIE n. a person who is sentimental, weakly foolish, or lacking in physical endurance ...1886
• SOFTY a person who is sentimental, weakly foolish, or lacking in physical endurance ...1886
• SOP a fool; a soft-head ...Bk1891 sl.
• SOPPY DATE a foolish or silly person ...1914 UK sl.
• SPOON a fool, a simpleton ...L18 sl.
• SPOONEY a fool, a simpleton ...L18 sl.
• SPOONY a fool, a simpleton ...L18 sl.
• SQUIRE, THE a simpleton, a fool ...L17 sl.
• S.S. a fool; (Sammy Soft) ...c1840 sl.
• STEAMER a fool; a victim ...1932 UK sl.
• STEAM TUG a fool; a victim ...1932 UK rhyming sl = mug
• STIFFY a foolish person ...1965 US sl.
• STRACKLE-BRAIN a giddy, thoughtless person; a simpleton, a fool; a good-for-nothing ...1877 Eng. dial.
• STRUT-NODDY a mincing fool ...Bk1904 sl.
• STUB a fool; an oaf...1632-74 sl.
• STUMP an oaf; a fool; a blockhead...19C Brit. sl.
• STUPE a foolish person ...1762 sl.
• SUCK-EGG a fool, a silly person, a stupid fellow ...1609 Eng. dial. & sl.
• TACK a fool ...1950s US Black sl.
• TAME CAT a person who is made a convenience by his friends; a foolish fellow, a simpleton ...1885
• TAME-FELLOW † a person who is made a convenience by his friends; a foolish fellow, a simpleton ...a1700
• TAME-GOOSE † a foolish fellow; a simpleton ...1605
• TAPLOCH † a giddy, foolish girl ...1824 Sc.
• TAPPY a foolish, giddy, awkward, idle, or slovenly girl ...1824 Sc.
• TASSEY a mischievous child; a foolish, romping girl; a silly fellow ...1808 Sc. & Eng. dial.
• TASSY a mischievous child; a foolish, romping girl; a silly fellow ...1808 Sc. & Eng. dial.
• TAUPIE a foolish, giddy, awkward, idle, or slovenly girl ...1824 Sc.
• TAWPIE a foolish, giddy, scatterbrained, untidy, awkward, or careless person; an idle or slovenly person; generally applied to young women ...1728 Sc.
• TAZIE a mischievous child; a foolish, romping girl; a silly fellow ...1808 Sc. & Eng. dial.
• TAZZY a mischievous child; a foolish, romping girl; a silly fellow; a simpleton ...1808 Sc. & Eng. dial.
• TETAW a simpleton, a fool ...Bk1905 Eng. dial.
• THICK a foolish person ...1857 sl., orig. schoolchildren's usage
• THICKHEAD a fool; a soft-head ...Bk1891 sl.
• THICKIE a foolish person ...1968 sl.
• THICKO a foolish person ...1976 sl.
• THITER a foolish fellow; an idiot ...Bk1905 Eng. dial.
• THOMAS a fool, a simpleton ...1934 Sc.
• THRUM-YED a foolish fellow ...Bk1905 Eng. dial.
• TIN EAR a fool; a simpleton ...1930s Aust. & US sl.
• TIT a foolish person ...1947 sl.
• TITTLE-GOOSE a foolish, tattling person; a telltale, a foolish blab ...1807 Eng. dial.
• TOM FARTHING a fool, a simpleton ...1689
• TOM FOOL a foolish or stupid person; one who behaves foolishly ...1721
• TOMMY a simpleton, a fool ...1829
• TOMMY-NODDY a foolish or stupid person ...1828
• TOM-NODDY a foolish or stupid person; a blockhead, dunce, dolt, simpleton ...1828
• TOM TUG a fool; a soft-head ...Bk1891 sl.
• TONEY † a foolish person; a simpleton ...1654 sl.
• TONK a foolish person ...1941 sl., chiefly Aust.
• TONY † a foolish person; a simpleton ...1654 sl.
• TOOL a fool ...sl.
• TOOT an idle or worthless person; a shiftless, lazy person; a simpleton, a fool; an oaf ...1888 Eng. & Amer. dial.
• TRONK an idiot; a foolish person ...1970s UK teen sl.
• TRONK-HEAD an idiot; a foolish person ...1970s UK teen sl.
• TUNKLEHEAD a fool ...1941 Amer. dial.
• TWERP a foolish person ...1874 sl.
• TWINK a jerk; an incompetent fool ...20C US sl.
• TWIRP a foolish person ...1874 sl.
• TWIT a foolish person ...1934 sl., chiefly Brit.
• UDDER a despised, disrespected or foolish woman ...2001 UK sl.
• UMPCHAY a fool; a sucker, an oaf ...1920s Pig Latin for 'chump'
• UNCHAGHE † a foolish or wanton woman ...1534
• UNCONSCIOUS a fool ...1920s US college sl.
• UNWISEMAN † a fool, a simpleton ...1400
• VEAL a fool, a simpleton ...M16 sl.
• WAD a fool, an idiot, an unpleasant person ...20C sl., orig. US college
• WAD-WASTE a fool, an idiot, an unpleasant person ...20C sl., orig. US college
• WAFFLE-BAGS a foolish person who talks much, and foolishly ...1884  Eng. dial.
• WALLY a foolish person ...1969 Brit. sl.
• WANT-WIT one who lacks wit or sense; a fool ...1448-9
• WARB a fool, a simpleton ...1930s Aust. sl.
• WATERHEAD a foolish person ...1960s sl.
• WATTY a simpleton; an indiscreet or foolish person ...B1900 Eng. dial.
• WAZZOCK a foolish person ...1983 Brit. sl.
• WEAPONHEAD a foolish person ...1980s Aust. prison sl.
• WET a fool, an oaf ...20C Aust. sl.
• WHACKER a fool ...1960s Aust. sl.
• WIDGEON † applied to a person, in allusion to the supposed stupidity of the bird; a fool, a simpleton ...1612
• WIGEON a fool, a simpleton ...E17 arch.
• WISE MAN OF GOTHAM, A a fool ...1840
• WITTY a fool; a mentally retarded person ...1940 Amer. dial.
• WOMBLE a fool; a socially inept person ...1970s Brit. sl.
• WOODCOCK a gullible fool; an oaf ...15C
• WOODENTOP a fool ...1983 UK sl.
• WOZZ a fool; an idiot ...Brit. sl.
• WOZZLE a fool; an idiot ...Brit. sl.
• WUL a fool ...Brit. sl.
• WULBERT a fool ...Brit. sl.
• YACK a fool, a stupid fellow, an oaf ...1950s US Western sl.
• YAK a fool ...1950s US Western sl.
• YAP a foolish person; one slightly weak in intellect ...Bk1905 Eng. & dial.
• YAPPY a foolish person; one slightly weak in intellect ...Bk1905 Eng. dial.
• YAP-STICK a foolish person; one slightly weak in intellect ...Bk1905 Eng. dial.
• YARD DOG a fool; a gullible person ...1930s US Black sl.
• YASHA an idiot; a fool ...1970s homosexual sl.
• YAUP one who has a vacant stupid look; a fool, an oaf, a yokel ...1896 Sc.
• YAWNAX a stupid person; a fool; a lazy, uncouth person; a boor ...1870 Eng. dial.
• YAWNEY a stupid, lazy, sleepy person; a fool ...1876 Eng. dial.
• YAWNUP a stupid person; a fool; a lazy, uncouth person; a boor ...1870 Eng. dial.
• YAWNUPS a stupid person; a fool; a lazy, uncouth person; a boor ...1870 Eng. dial.
• YAWNUX a stupid person; a fool; a lazy, uncouth person; a boor ...1870 Eng. dial.
• YAWNY a fool; a simpleton ...19C sl.
• YAWP one who has a vacant stupid look; a fool, an oaf, a yokel ...1896 Sc.
• YORNEY a lazy, stupid person; a fool ...1876 Eng. dial.
• YO-YO a foolish person ...1970 US sl.
• ZAMMY a simpleton, a fool; an ill-natured fellow; an effeminate weakling; a lunatic ...1876 Eng. dial.
• ZATENFARE a foolish, weak person; one easily imposed upon ...1777 Eng. dial.
• ZHLOB an oaf or dolt; a fool ...M20 US sl.
• ZHLUB an oaf or dolt; a fool ...M20 US sl.
• ZIB a fool or sucker; an oaf or nincompoop ...20C US sl.
• ZIRCON a fool ...1960s US sl.
 
FOOL, FOOLISH - verbs (also see BEFOOL, FOOL ABOUT verbs)
• ACE OUT to fool someone; to swindle someone ...1933 US sl.
• ACT THE ANGORA to play the fool ...1942 Aust. sl.
• ACT THE GIDDY GOAT to behave foolishly ...L19 sl.
• ACT THE GOAT to behave foolishly ...L19 sl.
• ACT THE HOG to play the fool ...1900s sl.
• ACT THE MAGGOT to play the fool ...1937 Irish sl.
• ACT THE MONKEY to play the fool ...1900s sl.
• ACT THE JINNIT to play the fool; to act irrationally ...20C Irish sl.
• ACT THE NIGGER 1. (derogatory) to play the fool ...M19 US sl.
  2. to act in a manner White racists expect of Black people, i.e. foolish, subservient, clownish ...M19 US Black sl.
• ACT THE PRICK to behave foolishly ...1980s sl.
• ADOLESCENTURATE † to play the boy, or fool ...1626
• ASS OUT to make a fool of oneself ...1990s US college sl.
• BAFFLE † to hoodwink, to gull, to cheat; to humbug; to make a fool of ...c1590
• BAMFOOZLE to fool or swindle; to confuse ...1851 Amer. dial.
• BEDAFF † to make a fool of, to make foolish ...c1386
• BEDAW to make a fool of ...a1529
• BEGAB † to fool with words, to mock, to deceive, to delude; to impose upon ...1297
• BELIEVE THE MOON IS MADE OF CHEESE to believe firmly something astounding, impossible, or absurd; hence, to be a fool ...18C colloq.
• BE NOT AS GREEN AS ONE IS CABBAGE-LOOKING be less than a fool than might be assumed ...colloq.
• BE WRONG IN ONE'S GARRET to be foolish or wanting in intellect, or suffering from temporary delirium ...1869 sl.
• BIG-ASS to make a fool of ...1984 US sl.
• BLIND to confound or stump someone; to fool ...1916 Amer. college usage
• CHILL OUT to stop acting foolish ...1981 US Black sl.
• CHUMP 1. to trick, to deceive; to make a fool of someone ...1920s sl.
  2. to act like a fool; to be exploited ...1960s US Black sl.
• CHUMP OFF to act like a fool ...1930s US Black sl.
• CHUMP OUT to trick, to deceive; to make a fool of someone ...1920s sl.
• CLEAVE THE CLOUDS to act foolishly and to no purpose ...B1900
• COME ON ONE'S GUAVA to make a fool of oneself ...1970s S. Afr. sl.
• COME THE ABDABS to fool someone ...1940s sl.
• COME THE OLD ABDABS to hoax, to fool ...1940s sl.
• CONFISCATE THE MACAROON to 'take the biscuit'; to be the most remarkable or foolish of its kind ...c1918 Brit. sl.
• CRAP AROUND to waste time; to behave foolishly or aimlessly ...1935 US sl.
• CROWN WITH A MAROTTE † to make a fool of ...1630
• CUDDLE AND KISS to make a fool of, to 'take the piss' ...1992 UK rhyming sl.
• CUT A BIG GUT to do something foolish ...Bk1942 Amer. sl.
• DAFF to play the fool ...1535 chiefly Sc.
• DESERVE THE BAUBLE † to make a fool of ...1606
• DO ONESELF to make a fool of oneself; to embarrass oneself ...1980s US sl.
• DUD to fool or deceive; to swindle ...1970 Aust. sl.
• DUKE to fool; to deceive ...1975 US sl.
• EAT ONE'S NAILS to do something foolish ...E18 sl.
• FAKE to trick, to fool; to cheat; to swindle; to deceive ...1859 sl.
• FAKE OUT to fool an opponent with a feint; hence, generally, to bluff, to fool; to get the better of; to dupe, to deceive ...1949 Amer. sl., orig. football & basketball usage
• FART ABOUT to dawdle, to mess around, to potter, to waste time in trifling activity; to behave foolishly or aimlessly ...1910s sl.
• FART AROUND to dawdle, to mess around, to potter, to waste time in trifling activity; to behave foolishly or aimlessly  ...1969 sl.
• FATUATE to become silly, to act foolishly, to play the fool ...1656 arch.
• FILL to fool; to provide with misinformation ...1968 Amer. dial.
• FILL UP to fool; to provide with misinformation ...1879 Amer. dial.
• FLUMMOX to fool, to confuse, to overcome by trickery; to bewilder ...1837 sl.
• FLUMMUX to fool, to confuse, to overcome by trickery ...19C sl.
• FOOLIFY † to make a fool of; to befool ...1581 obs. exc. Eng. dial.
• FOOTLE to talk or act foolishly; to do anything in a feeble or ineffectual manner; to dawdle, to trifle, to potter; to idle, to waste time ...1892 sl.
• GAME † to befool, to jeer at, to mock, to delude ...1698 UK sl.
• GAMMON to deceive, to fool, to talk humbug,...1812
• GIVE A RIDE to deceive, to fool, to trick, usually for financial gain ...1920s sl.
• GIVE SOMEONE THE ABDABS to fool someone ...1940s sl.
• GIVE SOMEONE THE GUY to make a fool of someone; to tease ...19C sl.
• GIVE SOMEONE THE OLD ABDABS to fool someone ...1940s sl.
• GIVE THE BAUBLE † to make a fool of, to befool ...1599
• GREEN to tease, to make a fool of; to annoy with practical jokes; to outwit ...1923 Amer. dial.
• GREEN ON to tease, to make a fool of; to annoy with practical jokes; to outwit ...1887 Amer. dial.
• GREEN OUT to tease, to make a fool of; to annoy with practical jokes; to outwit ...1887 Amer. dial.
• GUCK † to trifle; to play the fool ...c1560 Sc.
• HAIVER to talk in a foolish, incoherent manner ...1816 Sc.
• HALLOCK to behave in a foolish, noisy way ...Bk1905 Sc.
• HAVEREL to talk nonsense, to make a fool of ...1822 Sc. & Eng. dial.
• HOLD A LOOKING-GLASS TO A MOLE to act foolishly and to no purpose ...B1900
• IDIOTIZE to make a fool of; to befool ...1831
• JACK ACT to play the fool ...1920s Irish sl.
• JEFF to talk, to chatter, esp. to seduce, to fool or deceive with a 'line' ...1960s US Black sl.
• JERK SOMEONE'S CHAIN to deceive, to fool, to victimize ...Amer. sl.
• JERK SOMEONE'S STRING to deceive, to fool, to victimize ...Amer. sl.
• LARK to play, esp. the fool; to be mischievously merry; to go on the spree ...1813 colloq.
• LAY IT OVER to fool, to deceive ...1878 Amer. sl.
​• LOSE OUT to be swindled or merely fooled ...L19 Aust. sl.
• MACKY-MOON to play the fool ...B1900 Eng. dial.
• MAFFLE to act or talk in a foolish way ...Bk1905 Eng. dial.
• MAKE A MONKEY (OUT) OF to make a fool of; also, to hold up to ridicule ...1895 Amer. sl.
• MONK to make a fool of ...1916 Amer. dial.
• MUCK ABOUT to waste time; to behave foolishly or aimlessly ...1856
• MUCK UP to play the fool ...c1910 Aust. sl.
• NAFFLE to trifle away time; to potter about; to loiter; to act foolishly ...1796 Sc. & Eng. dial.
• NANNICK to play the fool; to play when one should be working; to idle away one's time; to fidget ...Bk1905 Eng. dial.
• NANNOCK to play the fool; to play when one should be working; to idle away one's time; to fidget ...Bk1905 Eng. dial.
• NICK to fool ...1593
• NIFF-NAFF to trifle; to toy; to take finicking trouble; to talk or act foolishly or aimlessly ...1728 Sc. & N. Eng. dial.
• NONNOCK to play the fool; to play when one should be working; to idle away one's time; to fidget ...Bk1905 Eng. dial.
• NONNUCK to play the fool; to play when one should be working; to idle away one's time; to fidget ...Bk1905 Eng. dial.
• OAF to act in a foolish, childish manner; to play the fool ...1882 Sc. & Eng. dial.
• OAF ABOUT to act in a foolish, childish manner; to play the fool ...1882 Sc. & Eng. dial.
• PACK IT IN to stop talking; to stop fooling or some foolish practice ...c1925 Services' sl.
• PACK IT UP to stop talking; to stop fooling or some foolish practice ...c1925 Services' sl.
• PAPPY SHOW to make a fool of someone ...L19 W. Indies
• PIDDLE ABOUT to behave foolishly, and esp. in a time-wasting way ...1545 sl.
• PIDDLE AROUND to behave foolishly, and esp. in a time-wasting way ...1545 sl.
• PISS ABOUT to waste time; to behave foolishly or aimlessly ...1961 sl.
• PISS AROUND to behave foolishly, and esp. in a time-wasting way ...1961 Brit. & Aust. sl.
• PLAY HORSE to play the fool or engage in horseplay ...1892 US sl.
• PLAY OFF ON to deceive, to fool, to trick ...1863 Amer. dial.
• PLAY SILLY BLEEDERS to waste time; to behave foolishly or aimlessly ...1961 sl.
• PLAY SILLY Bs to waste time; to behave foolishly or aimlessly ...1961 sl.
• PLAY SILLY BUGGERS to waste time; to behave foolishly or aimlessly ...1961 sl.
• PLAY SOMEONE FOR A CHINAMAN (now considered offensive) to treat as a fool ...1873 Amer. sl.
• PLAY THE GOAT to act the fool ...L19 sl.
• PLAY THE JACK to act the fool ...Bk1896 sl.
• PLAY THE MONKEY to play the fool ...1900s sl.
• PLAY THE NANNY-GOAT to behave like a fool; to play foolish tricks ...1900 Eng. dial.
• POPPY SHOW to make a fool of someone ...L19 W. Indies
• PRAT ABOUT to behave foolishly, and esp. in a time-wasting way ...1961 Brit. sl.
• PULL SOMEONE'S CHAIN to deceive, to fool, to victimize ...Amer. sl.
• PULL SOMEONE'S PLONKER to fool someone; to tease someone; to take a liberty with someone...2000 UK sl.
• PULL SOMEONE'S STRING to deceive, to fool, to victimize ...Amer. sl.
• PULL SOMEONE'S TIT to good-naturedly hoax or deceive someone; to make a fool of someone ...1959 Aust. sl.
• PUPPY SHOW to make a fool of someone ...L19 W. Indies
• PUT A ROPE TO THE EYE OF A NEEDLE to attempt the impossible or absurd; to act foolishly and to no purpose ...B1900
• PUT THE CAP ON SOMEONE to fool them ...1966 Amer. dial.
• RAG ABOUT to fool about ...20C sl., orig. & chiefly university
• RATTLE SOMEONE'S CHAIN to deceive, to fool, to victimize ...Amer. sl.
• RATTLE SOMEONE'S STRING  to deceive, to fool, to victimize ...Amer. sl.
• ROAST SNOW IN A FURNACE to attempt the unnecessary or absurd; to act foolishly and to no purpose ...1883 sl.
• RUN THE HOG to play the fool ...1900s sl.
• SAWNEY to act the sawney, to fool ...B1900
• SEEK A NEEDLE IN A BOTTLE OF HAY to attempt an extremely difficult, impossible, or foolish task ...1690
• SEEK A NEEDLE IN A TRUSS OF HAY to attempt an extremely difficult, impossible, or foolish task ...1711
• SELL AN OX TO CATCH A HARE to act foolishly ...B1900
• SELL ANY ONE A BARGAIN † to make fool of him, to 'sell' him ...1588
• SHOW A TRICK to outwit, to fool, to deceive ...1982 NZ sl.
• SIMP to act like a fool ...1960s US Black sl.
​• SLIP ON ONE'S GUAVA to make a fool of oneself ...1970s S. Afr. sl.
• SPOOF to hoax, to fool, to trick ...L19 sl.
• STOOGE to fool, to deceive ...1990s Aust. sl.
• STRING to fool or hoax; to deceive, to dupe ...1812 sl., chiefly US
• TAKE FOR A RIDE to deceive, to fool, to trick, usually for financial gain ...1920s sl.
• TAKE FOR A TROT to deceive, to fool, to trick, usually for financial gain ...1920s sl.
• TAKE THE PISS OUT OF of a person: to act absurdly, to play the fool ...1990 sl.
• TAKE THE TA-TA to make a fool of someone; to pull someone's leg, to tease ...1992 UK rhyming sl. for 'take the piss' (take the ta-ta kiss)
• TAKE THE TA-TA KISS to make a fool of someone; to pull someone's leg, to tease ...1992 UK rhyming sl. for 'take the piss'
• TALK TURKEY to talk foolishly ...E19 sl., orig. US
• TATTER to make a fool of anyone ...Bk1905 Eng. dial.
• TEACH IRON TO SWIM to act foolishly and to no purpose ...1809
• TOM-FOOL to play the fool ...1825
• TONY †* to make a fool of; to fool, to cheat, to swindle ...a1652
• WALK DOWN ONE'S BACK to take one in; to make a fool of one ...1867 Eng. dial.
• WEAR THE BELLS to act the fool ...1931 Amer. dial.
• WRITE ON THE SURFACE OF THE SEA to act foolishly and to no purpose ...B1900
• YANK SOMEONE'S CHAIN to deceive, to fool, to victimize ...Amer. sl.
• YANK SOMEONE'S STRING to deceive, to fool, to victimize ...Amer. sl. Dict
• YUCK IT UP to behave foolishly, and esp. in a time-wasting way ...1961 sl., chiefly Amer.
• YUK IT UP to behave foolishly, and esp. in a time-wasting way ...1961 sl., chiefly Amer.
 
FOOL, FOOLISH - phrases
• FOOL'S A MONKEY'S MASTER, A said to one who calls another a fool ...B1900 Eng. dial.
• HE DOESN'T KNOW IF HIS ARSEHOLE IS BORED OR PUNCHED he's a complete fool ...E20 sl.
• I DIDN'T COME DOWN IN THE LAST SHOWER I'm not stupid; don't take me for a fool ...20C Aust. sl.
• I DIDN'T COME DOWN IN THE LAST SHOWER OF RAIN I'm not stupid; don't take me for a fool ...20C Aust. sl.
• I DIDN'T FALL OFF A CHRISTMAS TREE I'm not stupid; don't take me for a fool ...1940s sl.
• NOT SO GREEN AS I'M CABBAGE-LOOKING I'm not such a fool as I may appear ...L19 sl.
• THERE ARE MANY WAYS OF DRESSING CALVES' HEADS many ways of saying or doing a foolish thing; a simpleton has many ways of showing his folly; or, generally, if one way won't do, we must try another ...Bk1891 sl.
• THERE ARE NO FLIES ON HIM he is no fool
 
FOOL ABOUT, FOOL AROUND - nouns, person
• FART-OFF a person who shirks responsibilities; a loafer; one who always fools around ...1942 Amer. sl.
 
FOOL ABOUT, FOOL AROUND - verbs
• ANTIC to fool around, to play ...1976 Amer. dial.
• ARSE ABOUT to idle, to fool about; to waste time ...1664 Brit.
• ARSE AROUND to idle, to loaf, to loiter, to fool about, to act irresponsibly, to trifle ...1664
• ASS AROUND to fool around, to loiter, to waste time; to wander aimlessly; to be idle; to act irresponsibly; to trifle ...1914 Amer. sl.
• ASSEN AROUND to fool around; to loiter; to waste time; to be idle ...1966 Amer. dial.
• BOLLIX AROUND to fool around ...c1960 Amer. dial.
• BUGGER ABOUT to behave foolishly, and esp. in a time-wasting way ...1929 Brit. & Aust. sl.
• BUGGER AROUND to behave foolishly, and esp. in a time-wasting way ...1929 Brit. & Aust. sl.
• CAT to gad about; to fool around ...1938 Amer. dial., chiefly among Blacks
• CAT AROUND to gad about; to fool around ...1938 Amer. dial., chiefly among Blacks
• FADE to fool around or tinker with something or someone ...1990s US Black teen sl.
• FAFF to mess about, restlessly and ineffectually, wasting time, often while something quite urgent needs attention; to play or fool around, to waste time ...c1930
• FAFF AROUND to mess about; to waste time on matters of no importance; to play or fool around ...1874 UK sl.
• FAFF ABOUT to behave foolishly, and esp. in a time-wasting way ...1874 sl., orig. Eng. dial.
• FANDANGLE to hang about, to trifle, to waste time, to 'fool' around ...1892 Ireland
• FART ABOUT to waste time; to behave foolishly or aimlessly ...1900 sl.
• FART AROUND to dawdle, to mess around, to potter, to waste time in trifling activity; to behave foolishly or aimlessly  ...1931 sl.
• FART OFF to fool around; to shirk one's duties; to blunder through inattention; to procrastinate ...1968 Amer. sl.
• FIDDLE-DEE-DEE AROUND to meddle, to fool around ...1963 Amer. dial.
• FIDDLE-FART to fool around, to waste time. to loaf, to dawdle, to shirk responsibility ...1975 Amer. dial.
• FIDDLE-FART AROUND to fool around, to waste time. to loaf, to dawdle, to shirk responsibility ...1972 Amer. sl.
• FIDDLE-FOOT AROUND to fool around, to move restlessly ...1963 Amer. dial.
• FIDDLEFUCK AROUND to fool around, to waste time. to loaf, to dawdle, to shirk responsibility ...1984 Amer. dial.
• FUCK ABOUT to behave foolishly, and esp. in a time-wasting way ...1922 sl.
• FUCK AROUND to behave foolishly, and esp. in a time-wasting way ...1922 sl.
• FUTZ AROUND to behave foolishly, and esp. in a time-wasting way ...1929 US sl.
• GAY-CAT to gad about; to fool around ...1938 Amer. dial., chiefly among Blacks
• GET OUT OF ONE'S RINK to sow wild oats ...Bk1903 colloq.
• GOOF to behave foolishly, and esp. in a time-wasting way ...1929 sl., chiefly US
• GOOF AROUND to behave foolishly, and esp. in a time-wasting way ...1929 sl., chiefly US
• GOOF OFF to behave foolishly, and esp. in a time-wasting way ...1943 sl., chiefly US
• HACK to socialize idly; to gad or fool about; to waste time ...1888 Amer. sl.
• HACK ABOUT to socialize; to fool about ...1920s US college sl.
• HACK AROUND to socialize idly; to gad or fool about; to waste time ...1923 US college sl.
• HACK OFF to idle; to loaf; to lounge; to go about aimlessly looking for distraction; to gad or fool about; to waste time ...1920s US college sl.
• HORSE to indulge in rough jokes or horseplay; to fool around; hence, to waste time in trifling activity; also, to philander (now usually with 'around')...1900 US sl.
• JACK OFF to fool around, to do nothing ...1940s US sl.
• JAG AROUND to fool around; to goof off ...1968 Amer. dial.
• JAZZ AROUND to fool around ...1917 Amer. dial.
• LALLIGAG to dawdle, to dally, to fool about ...L19 US sl.
• LALLYGAG to dawdle, to dally, to be idle; to waste time out of ineptitude or design; to fool about ...1862 US sl.
• LOLLIGAG to dawdle, to dally, to fool about ...L19 US sl.
• LOLLYGAG to dawdle, to dally, to fool about; to be idle; to waste time out of ineptitude or malicious design ...1862 US sl.
• LOON to fool about like a lunatic ...1960s Brit. criminals' sl.
• LOON ABOUT to fool about like a lunatic ...1979 Brit. sl.
• LOSE TIME to waste time; to fool around ...1967 Amer. dial.
• MEDDLE AROUND to fool around; to go about aimlessly looking for distraction ...1968 Amer. dial.
• MESS to dawdle or putter; to fool around; to kid around, to tease ...1966 Amer. dial.
• MESS WITH to become involved with; to use; to fool around with ...19C US sl.
• MONK to tinker, trifle, or fool around; to tamper or interfere with surreptitiously ...1889-90 Amer. sl.
• MONKEY to tinker, trifle, or fool around; to fritter away one's time; usually used with 'with' ...1877-78 Amer. sl.
• MONKEY AROUND to act without purpose; to play around ...1884 Amer. colloq.
• MONKEY-FART AROUND to waste time; to fool about ...a1970 Amer. sl.
• MUCK ABOUT to fool around; to trifle with ...1856 sl.
• MUCK AROUND to fool around ...1856 UK sl.
• NUTS to fool around ...1941 Amer. sl.
• PISS-ARSE ABOUT to fool about; to waste time ...c1920 army sl.
• SHUCK to be deceptive or evasive; to tell tall tales or lies; to fool around, to tease ...1968 Amer. dial.
• SHUCK AND JIVE to act irresponsibly; to fool around ...1970 Amer. dial.
• SILLY to act foolishly; to fool about ...1877 chiefly Eng. dial.
 
FOOLED - adjectives
• EASY easily taken advantage of or imposed upon; easily fooled; credulous, gullible ..1698
 
FOOLED - nouns, person
• EASY MEAT someone who is easily fooled or seduced; a dupe; an easy target for deception ...L19 sl.
 
FOOLERY - nouns
• BARNEY nonsense, foolery ...1868 Eng. dial.
• BARNEYING nonsense, foolery ...Bk1898 Eng. dial.
• BAUBLE a childish or foolish matter of affair; a piece of childish foolery ...1579
• BAUBLERY † childish foolery; trifling business ...1583
 
FOOLHARDY - adjectives
• COLL-HARDY †* foolhardy; foolishly rash ...1581
• DARESOME venturesome, foolhardy ...1864 Eng. dial.
• DARING-HARDY † foolhardy, presumptuous, audacious ...1593
• FLASH conceited, foolhardy, swaggering ...Bk1892 Aust. sl.
• TEMEROUS * rash, reckless, foolhardy ...1461
• VENTURELESS venturesome, foolhardy, rash ...Bk1905 Eng. dial.
 
FOOLHARDY - nouns
• MOONRAKING the act of taking part in a foolhardy or unfruitful activity
 
FOOLHARDY - verbs
• DO DAGS to do something that the other person cannot do; to show off; to play foolhardy tricks ...c1850 colloq.
• HAVE BRASS BALLS to be foolhardy, over-bold ...Bk2002 Amer. sl.
• HAVE CAST-IRON BALLS to be foolhardy, over-bold ...Bk2002 Amer. sl.
• PLAY WITH THE BULL to run needless risks; to be foolhardy ...B1900 Eng. dial.
• TAKE A BEAR BY THE TOOTH to take foolhardy risks ...1719
 
FOOLING - adjectives
• DALLACKING fooling, play acting ...2000 Ireland sl.
• PROMOSSING talking rubbish, playing the fool, mooning about ...Bk1892 Aust. sl.
 
FOOLING, FOOLISH, FOOLISHNESS - nouns
• ADDLE-HEADEDNESS fatuity, foolishness, folly ...1835
• BALONUS pretentious nonsense; humbug; foolishness ...1929 Amer. sl.
• BLADRY foolishness, deception ...Bk1911 Sc.
• BLETHERIE foolishness; deception ...Bk1911 Sc.
• BLUTE a bad or foolish action ...Bk1911 Sc.
• CACA nonsense, rubbish; foolishness ...1970s US sl.
• CHAFF nonsense, humbug, foolishness, ridicule; small, unimportant things or acts ...1859 Amer. dial.
• COD-ACTING foolish behaviour ...20C sl., orig. Irish
• DAFF fun, frolic; playing the fool ...1737 Sc.
• DAFFERY † folly, foolishness, gaiety, sportiveness; thoughtlessness ...1768 Sc.
• DAFFING fooling, folly ...1535
• DAFFLIN fooling, merriment ...Bk1900 Eng. dial.
• DAFFRY † folly, foolishness; thoughtlessness ...1768 Sc.
• DAFTNESS foolishness, dullness, madness ...1552 chiefly Sc. & Eng, dial.
• FADOODLE †* something foolish or ridiculous; nonsense; a mere nothing; a useless trifle ...a1670
• FANDANGLE stupidity, foolishness ...1940s W. Indies sl.
• FARADIDDLE nonsense, foolishness ...1944 Amer. dial.
• FATUOUSNESS besotted foolishness, stupidity, infatuation; imbecility ...1874
• FIGGLE-FAGGLE conduct which is foolish, ludicrous, or unbecoming; silly or trifling conduct; ridiculous behaviour ...19C Sc.
• FLUMMYDIDDLE foolishness, nonsense ...1903 Amer. dial.
• GOOFINESS foolishness ...1910s sl.
• GUCKRY † foolishness, folly ...1596 Sc.
• HAIVER a piece of folly or nonsense; a whim, a piece of foolishness ...1793 Sc.
• HAPPY HORSESHIT foolish stuff ...1971 US sl., esp. military usage
• HAVRELISM the habit of behaving in foolish, harum-scarum fashion ...1826 Sc.
• IDLENESS †* light-headedness, imbecility; delirium; also, folly, foolishness, silliness ...a1536
• LALLYGAG foolishness, nonsense; idle talk, chatter ...1862 Amer. dial.
• LEATHER-HEADEDNESS stupidity; foolishness ...1879 Amer. dial.
• LEG-PULL the act of deceiving or fooling someone ...1915 Amer. sl.
• LEWDHEDE †* ignorance; want of skill, knowledge, or good-breeding; foolishness ...1401
• LEWDNESS † ignorance; want of skill, knowledge, or good-breeding; foolishness ...1362
• LOLLYGAG foolishness, nonsense; idle talk, chatter ...1862 Amer. dial.
• MAZERY nonsense, foolery; madness ...1897 Eng. dial.
• MIFF-MAFF nonsense; foolishness ...1858 Eng. dial.
• MIFKY-PIFKY foolishness or mischief, esp. of a romantic or sexual nature; sexual activity; hanky panky ...1985 Amer. jocular
• MONKEY BUSINESS foolishness; also, underhand actions or trickery; misbehaviour ...1883 Amer. sl.
• MONKEY CAPERS monkey business ...1846 Amer. sl.
• MONKEY PLAY foolishness; also, underhand actions or trickery; misbehaviour ...1953 Amer. sl.
• MONKEY-SHINES foolish behaviour ...c1832 US sl.
• MONKEY TRICKS foolish behaviour ...1653 sl.
• MONKEY WORK foolishness; also, underhand actions or trickery; misbehaviour ...1942 Amer. sl.
• MOOFKY-POOFKY foolishness or mischief, esp. of a romantic or sexual nature; sexual activity; hanky panky ...1994 Amer. jocular
• MOOFTY-POOFTY foolishness or mischief, esp. of a romantic or sexual nature; sexual activity; hanky panky ...1996 Amer. jocular
• MOONSHINE foolish talk or thought
• NODDARY †* a foolish action, foolishness ...1647
• NOISE nonsensical talk; hence, foolishness ...1871 Amer. sl.
• OKEY-DOKE foolishness; stupidity; pretense ...1969 sl., esp. Black usage
• PAPPY SHOW foolishness, showing off ...L19 W. Indies
• POPPY SHOW foolishness, showing off; one who makes a stupid exhibition of themselves ...L19 W. Indies
• PUERILITY the state or quality of being a child; the quality of being childish, foolish, or trivial ...1425
• PUPPY SHOW foolishness, showing off; one who makes a stupid exhibition of themselves ...L19 W. Indies
• RAFF idle ways; foolishness ...Bk19C Eng. dial.
• RAGE † madness, folly, rashness; an instance of this; a foolish act ...a1300
• SAPHEADISM foolishness ...L18 sl.
• SAPPINESS foolishness, folly ...Bk1914 colloq.
• SCHMOOFKY-FOOFKY foolishness or mischief, esp. of a romantic or sexual nature; sexual activity; hanky panky ...1997 Amer. jocular
• SIMPLES † foolish or silly behaviour or conduct; foolishness, folly ...1648 obs. exc. Eng. dial.
• SIMPLESSE † deficiency in knowledge or learning; ignorance; also, lack of mental acuteness, intellectual weakness, foolishness ...c1400 obs. exc. arch.
• SOTTERY † a piece of foolishness or folly ...1598
• THING-A-ME-TOY a foolish act ...B1900 Eng. dial.
• TRUCK nonsense, foolishness ...1913 Amer. dial.
• VAINNESS † foolishness; stupidity ...1591
• VANITY † the quality of being foolish or of holding erroneous opinions ...c1386
• WANWIT † lack of wit, foolishness ...a1400 chiefly Sc.
• WOOBLES feeblemindedness, foolishness, idiocy ...1933 Amer. dial.
• YORNEYISHNESS simplicity, foolishness, half-wittedness ...1885 Eng. dial.
• YORNEYISM simplicity, foolishness, half-wittedness ...1884 Eng. dial.
 
FOOLING ABOUT, AROUND - adjectives
• GOOGY-GOOGY given to playing pranks; fooling around ...1960s sl.
 
FOOLING ABOUT,  AROUND - nouns
• BUN-WORRY a jollification; a hilarious occasion; a fooling about ...L19 Aust. & NZ sl.
 
FOOLISH - adjectives
• ABDERIAN given to incessant or continued laughter; inclined to foolish or excessive merriment; foolish, silly ...18C
• ADOTED † grown silly, become foolish; infatuated ...c1230
• ANSERINE stupid, foolish, silly 
• ANSEROUS as stupid as a goose; silly, foolish ...1826
• ASS-BRAINED foolish; silly; witless ...Bk1942 Amer. sl.
• BABOONISH foolish ...E16
• BALD-HEADED stupid, foolish ...1884 US Black sl.
• BALL-HEADED foolish ...1884 Amer. dial.
• BARMY light-headed, foolish ...1911 Sc. & Amer. dial.
• BARMY-BRAINED foolish, giddy, flighty; light-headed ...1824 Sc.
• BARMY-FACED having a foolish or silly expression ...1724 Sc.
• BEDAFT † foolish, stupid ...1572
• BEDLAM belonging to a madhouse; mad, wild, ill-behaved, foolish ...a1535
• BEDLAMITISH mad, foolish ...1824
• BEGOYT foolish ...1787 Sc.
• BENNISH foolish ...17C sl.
• BESOM-HEADED weak-minded, foolish, stupid ...1864
• BIRD-BRAINED foolish, slow-witted, unintelligent, stupid ...1922 sl.
• BLATHRIE nonsensical, foolish ...Bk1911 Sc.
• BLETHER-HEADED foolish; noisy ...Bk1911 Sc.
• BONE-HEADED foolish, slow-witted, unintelligent, stupid ...1903 sl., orig. US
• BOOF-HEADED gullible; foolish; stupid ...c1930 Aust. sl.
• BUFFLE-BRAINED stupid, foolish ...1900 Amer. dial.
• BUGGY foolish, silly, witless, crazy, demented, insane, mentally deficient ...1905 Amer. dial.
• BUGS foolish, silly, crazy, demented, insane, mentally deficient ...1915 Amer. dial.
• CAKE stupid, foolish, daft ...L19 sl.
• CAKEY stupid, foolish, daft; half-witted ...L19 sl.
• CALFISH foolish ...Bk1898 Eng. dial.
• CANG † foolish, silly ...a1225
• CANGED † foolish, besotted ...a1225
• CANK † foolish, silly ...a1225
• CEMENT-HEADED stupid, foolish ...1962 Amer. sl.
• CHANG † foolish, silly ...a1225
• CHANK † foolish, silly ...a1225
• CHUBBLE-HEADED silly, foolish ...1892 Eng. dial.
• CHUCKLE-HEADED stupid, foolish ...M18
• CLUELESS foolish, slow-witted, unintelligent, stupid ...1943 sl.
• COCK-BRAINED having little judgement; foolish and light-headed; silly, giddy, rash, harebrained, thoughtless, flighty ...1530
• COCKLE-BRAINED whimsical, eccentric, flighty, fanciful; foolish, chuckle-headed ...1824 Sc.
• CORK-BRAINED foolish; silly; witless ...Bk1942 Amer. sl.
• CORKY stupid, foolish ...2000s US Black sl.
• CORKY-BRAINED silly, foolish ...a1700 sl.
• CRAZY WITH THE HEAT foolish; silly; witless ...Bk1942 Amer. sl.
• CUCKOO foolish; silly; witless; slightly mad ...Bk1942 Amer. colloq.
• DAFFADOWN DILLY silly, foolish, simple ...1950s rhyming sl.
• DAFFEY eccentric; foolish ...L19 sl.
• DAFFING playful, sportive, foolish ...1724 Sc. 
• DAFFY daft; mad; crazy; silly; amusingly eccentric; foolish ...1884 US sl.
• DAFFYDOWNDILLY (also as 'daffydown dilly') silly, foolish, simple ...1950s rhyming sl.
• DAFFY-HEADED feather-brained; foolish; daft ...1981 UK sl.
• DAFT silly, foolish, stupid ...c1325 chiefly Sc. & N. Eng. dial.
• DAFT AS PANDON YATS silly, foolish ...Bk1905 Eng. dial.
• DAFT-HEADED foolish ...Bk1900 Eng. dial.
• DAFTISH somewhat silly, foolish, or stupid; somewhat slow of intellect, in some degree deranged ...1825 Sc. & Eng. dial.
• DAFT-LIKE foolish, dull-witted, mad, absurd ... 1790 Sc. & N. Eng. dial.
• DAFTLY weak-minded, foolish ...1880 Sc.
• DAMFOOL damnably foolish; silly; stupid and irritating ...c1895 colloq.
• DAMN-FOOL damnably foolish; silly; stupid and irritating ...19C colloq.
• DAMNFOOLISH foolish; silly; witless ...Bk1942 Amer. sl.
• DAMP foolish, stupid; crazy ...L19 sl.
• DAMPHOOL damnably foolish ...19C colloq.
• DAMPHOOLISH foolish; silly; witless ...Bk1942 Amer. sl.
• DANDERING foolish, weak-minded, twaddling; incoherent, rambling in speech ...Bk1900 Eng. dial.
• DATELESS stupefied, foolish, disordered in min, having the faculties failing through age ...1685 Eng. dial.
• DAUPET silly, stupid, foolish, imbecile ...1788 Sc.
• DAWPIT silly, stupid, foolish, imbecile ...1788 Sc.
• DEDA simple, foolish, of inactive mind and body ...B1900 Eng. dial.  
• DESIPIENT * foolish, silly, childish, playful; playing the fool; idly trifling ...1727
• DILEERIOUS extremely foolish ...1891 Sc.
• DILL-BRAINED foolish ...1975 Aust. sl.
• DILLY silly, foolish ...1905 Aust. sl.
• DIM foolish, slow-witted, unintelligent, stupid ...1892 sl.
• DIM-WITTED foolish, slow-witted, unintelligent, stupid ...1940 sl.
• DING-A-LING foolish, crazy ...1959 US sl.
• DINGBATS stupid, foolish ...1950 Aust. sl.
• DINGY foolish, silly, witless, crazy; confused, mixed up ...1911 Amer. dial.
• DIPPY foolish, unstable, silly; crazy, demented ...1899 US sl.
• DIZZELL foolish; silly; witless ...Bk1942 Amer. sl.
• DIZZY of a woman: silly, foolish ...1878 Amer. dial.
• DIZZY-DOPEY foolish; silly; witless ...Bk1942 Amer. sl.
• DIZZY-HEADED of a woman: silly, foolish ...1965 Amer. dial.
• DIZZY IN THE HEAD of a woman: silly, foolish ...1965 Amer. dial.
• DODDERING shaky, feeble, or infirm, as from old age; foolish, senile ...Bk1942 colloq.
• DOOFY silly, foolish, eccentric ...1980s US sl, chiefly juvenile usage
• DOPEY foolish, slow-witted, unintelligent, stupid ...1903 sl.. orig. US
• DOPY foolish, slow-witted, unintelligent, stupid ...1903 sl., orig. US
• DOTTY foolish; silly; witless ...Bk1942 Amer. colloq.
• DOZEY foolish, slow-witted, unintelligent, stupid ...1924 Brit. sl.
• DOZY foolish, slow-witted, unintelligent, stupid ...1924 Brit. sl.
• DUMB foolish, slow-witted, unintelligent, stupid ...1823 sl.
• DUMB-ASS stupid, foolish ...1957 US sl.
• DUMB-ASSED foolish, slow-witted, unintelligent, stupid ...1957 US sl.
• EGEDE † foolish ...a1225
• EMPTY-BEANED foolish; silly; witless ...Bk1942 Amer. sl.
• FARMER foolish ...M19 sl.
• FAT-BRAINED foolish, stupid ...L18 sl.
• FAT-HEADED foolish, stupid ...c1510
• FATUANT †* behaving foolishly; foolish, silly ...1641
• FATUOUS foolish, vacantly silly, stupid, besotted, infatuated ...1633
• FEATHER-BRAINED foolish, giddy, light-headed ...1820
• FEATHER-MINDED foolish; silly; witless ...Bk1942 Amer. sl.
• FEATHER-PATED foolish, giddy, light-headed, silly ...1820
• FIDDLE-BRAINED † foolish, frivolous ...B1900
• FISH foolish, stupid ...1980 Amer. dial.
• FLOCK-PATED † silly, stupid, foolish; giddy; having a head or brains like wool ...?1640
• FOLLY-FOO very foolish ...1898 Sc.
• FOND AS A BESOM very foolish; apt to commit absurd mistakes ...Bk1898 Eng. dial.
• FOOL foolish ...Bk1974 Amer. colloq.
• FOOL-HEADED foolish; silly; witless ...1914 Amer. sl.
• FOPPERLY † silly, foolish ...1599
• FUZZY foolish; silly; witless ...Bk1942 Amer. sl.
• GABY foolish, idiotic ...1874 Eng. dial.
• GAELIC foolish, ingenuous, naive ...1910 Sc.
• GAFFLED silly, foolish ...Bk1900 Eng. dial.
• GAGA foolish; silly; witless; sentimental about, infatuated ...1917 sl.
• GAIPY rash, foolish, imprudent ...1929 Sc.
• GALEERY foolish ...20C Irish sl.
• GAMALEERIE foolish ...1825 Sc.
• GAMAREERIE foolish ...1880 Sc.
• GAMMEREERIE foolish ...1880 Sc.
• GANDER-FACED foolish-looking ...L19 sl.
• GANDERISH foolish; silly; witless ...Bk1942 Amer. sl.
• GAPPY rash, foolish, imprudent ...1929 Sc.
• GAUFFIN light-headed, foolish, thoughtless, giddy ...1810 Sc.
• GAWBY foolish, idiotic; ill-mannered, uncouth ...1874 Eng. dial.
• GEND † foolish, simple ...a1500 Sc.
• GIDDISH †* giddy, fickle, foolish ...1566
• GIGGISH lively, flighty, wanton, trifling, silly, foolish ...1523
• GLAIKIT stupid, careless, foolish ...1889 Sc.
• GONNER-NOPED thoughtless, foolish ...Bk1900 Eng. dial.
• GOOFY silly, foolish ...1910s sl.
• GOOFY-ASS silly, foolish ...1910s sl.
• GOO-GOO foolish; mawkish; sentimental ...1910s US sl.
• GOOPISH foolish; silly; witless ...Bk1942 Amer. sl.
• GOOPY foolish; silly; witless ...Bk1942 Amer. sl.
• GOOSEY foolish, stupid. silly, light-headed, witless ...1919 Amer. dial.
• GORMLESS foolish, slow-witted, unintelligent, stupid ...c1746 sl.
• GUCKED † foolish, silly ...c1450 chiefly Sc.
• GUPPY foolish, stupid, silly ...c1930 sl.
• HAGGIS-HEADED soft-headed, foolish, stupid ...1715 Sc.
• HALF-BAKED foolish, silly, weak of intellect;  raw, inexperienced ...1897 Eng. dial.
• HALF-BAKED foolish, silly, half-witted, weak of intellect;  raw, inexperienced ...1855 Eng. dial.
• HALF-BAPTIZED foolish, silly, weak of intellect ...1795 Eng. dial.
• HALF-GONE foolish, silly, weak of intellect ...1893 Eng. dial.
• HALF RIGHT foolish, silly, weak of intellect ...1866 Eng. dial.
• HALF-ROCKED half-witted, silly, foolish, oafish ...1869 Eng. dial.
• HALF-SAVED half-witted, foolish, silly, weak of intellect ...1871 Eng. dial.
• HALF-SCRAPED foolish, silly, weak of intellect ...Bk1905 Eng. dial.
• HALF-SHAKED foolish, silly, weak of intellect ...Bk1905 Eng. dial.
• HALF-SHANNY foolish, silly, weak of intellect ...Bk1905 Eng. dial.
• HALF-SHAVED foolish, silly, weak of intellect ...Bk1905 Eng. dial.
• HALF-SOAKED foolish, silly, weak of intellect ...1895 Eng. dial.
• HALF-STRAIN foolish, silly, weak of intellect ...1873 Eng. dial.
• HALF-STRAINED foolish, silly, weak of intellect ...Bk1905 Eng. dial.
• HALF THERE foolish, silly, weak of intellect ...Bk1905 Eng. dial.
• HALF-THICK foolish, silly, weak of intellect ...Bk1905 Eng. dial.
• HALF-WITTED not having all one's wits; imbecile; foolish; stupid ...1712
• HALLACHIN noisy, foolish ...Bk1905 Sc.
• HALLOPIN unsteady, unsettled, foolish ...Bk1905 Sc.
• HALOKIT giddy, thoughtless, foolish, crazy ...1724 Sc.
• HARISH † of the nature of a hare; mad, foolish ...1552
• HASK foolish; not quite right in the head ...Bk1902 Eng. dial.
• HAUVING simple-witted, foolish, clownish ...Bk1902 Eng. dial.
• HAUVISH simple-witted, foolish, clownish ...Bk1902 Eng. dial.
• HAVEREL foolish, silly, half-witted, nonsensical; talking foolishly ...1685 Sc. & N. Eng. dial.
• HAVERIL foolish, silly, nonsensical; talking foolishly ...1685 Sc. & N. Eng. dial.
• HAWKED stupid, foolish ...1790 Sc.
• HEARTLESS † without understanding; foolish ...1382
• HEN-HEADED brainless, foolish ...B1900 Eng. & Amer. dial.
• HEN-MINDED brainless, flighty, capricious; foolish, silly, witless ...1892 Amer. dial.
• HOLLOW-HEADED foolish, silly ...B1900 Eng. dial.
• IDLE † void of meaning or sense; foolish, silly, incoherent ...1548
• IDLE-HEADED † of little understanding or intellect; silly, foolish; crazy ...1598
• INFIRM silly, foolish ...1890 Eng. dial.
• INSIPIENT * void of wisdom, understanding, or intellect; unwise, foolish, stupid ...1528
• JINGLE-BRAINED foolish; silly; witless ...Bk1942 Amer. sl.
• KANG † foolish, silly ...a1225
• KNOCK-SOFTLY stupid, foolish ...1887 Eng. dial.
• LACK-THOUGHT wanting or lacking thought; foolish, stupid, vacant ...1829
• LAMB-BRAINED foolish ...1998 NZ sl.
• LAME-BRAINED foolish, slow-witted, unintelligent, stupid ...1929 sl., chiefly US
• LEAN-WITTED silly, stupid, foolish; having little sense or shrewdness ...1593
• LEARY dazed, bewildered; foolish, half-witted ...1911 Amer. dial.
• LEATHER-HEADED stupid, foolish, slow-witted ...a1668
• LEFT-WITTED * dull, stupid, foolish, silly ...1616
• LEWD † foolish, unskilful, bungling; ill-bred, ill-mannered ...c1380
• LOLO insane, crazy; foolish, dull, stupid ...1938 Hawaii
• LOONY foolish; silly; witless ...Bk1942 Amer. sl.
• LUNY foolish; silly; witless ...Bk1942 Amer. sl.
• MAD AS A MAGGOT, AS very crazy, extremely eccentric; hence, egregiously foolish ...20C NZ sl.
• MADDED † mad, foolish ...Bk1905 Sc.
• MADDLING foolish, silly, flighty; confused ...Bk1905 Eng, dial.
• MAFFLING blundering, clumsy, foolish, stupid ...Bk1905 Eng. dial.
• MARMOSETICAL † characteristic of a marmoset; apishly foolish ...1630
• MAWMISH † foolish, silly, idle ...B1900
• MAZLING stupid, foolish, confused ...1885 Eng. dial.
• MEAT-HEADED foolish, slow-witted, unintelligent, stupid ...1949 sl., chiefly US
• MENSELESS thoughtless, silly, foolish; senseless ...1809 Sc.
• MOOKY foolish, contemptible, ineffectual ...1967 US sl.
• MOONY crazy; foolish; silly, esp. in demonstrating affection ...Bk1942 sl.
• MOPISH † foolish, silly
• MUDDLE-BRAINED confused, foolish, simple ...M18
• MUDDLE-HEADED confused, foolish, simple ...M18
• MUGGY foolish, in the manner of a mug ...1997 UK sl.
• MULLET-HEADED foolish, slow-witted, unintelligent, stupid ...1857 US sl.
• MUSH-FACED stupid, foolish ...1910s sl.
• MUTTON-HEADED foolish, slow-witted, unintelligent, stupid ...1768 sl.
• NANNY-CRATTY foolish, weak-minded, childish; of small account; generally used of persons, but also of a conversation or work ...Bk1905 Eng. dial.
• NARROW stupid, foolish ...Bk1902 sl.
• NEDDYISH silly, foolish ...Bk1905 Eng. dial.
• NENA simple, foolish ...Bk1905 Eng. dial.
• NERTS crazy, foolish ...1910s US sl.
• NERTZ crazy, foolish ...1910s US sl.
• NICKIN foolish, simple ...L17 sl.
• NIKEY foolish, simple ...L17 sl.
• NIKIN foolish, simple ...L17 sl.
• NINNY-NONNY foolish, weak-minded, childish; uncertain, of small account ...1865 Eng. dial.
• NISEY † foolish, dull ...1709
• NIZY foolish, dull ...L17 sl.
• NIZZIE foolish, dull ...L17 sl.
• OAFING stupid, foolish ...Bk1905 Eng. dial.
• OAF-ROCK'D half-witted, stupid, foolish, silly ...Bk1905 Eng. dial.
• OFF mad, very foolish ...L19 sl.
• OFF ONE'S NUT crazy; foolish ...Aust. sl.
• PAPER-SCULLED. foolish, simple ...L17 sl.
• PAPER-SKULLED foolish, simple ...L17 sl.
• PAPPY-SHOW foolish, ridiculous ...L19 W. Indies
• PEA-BRAINED foolish, slow-witted, unintelligent, stupid ...1950 sl.
• POPPY-SHOW foolish, ridiculous ...L19 W. Indies
• PRECIOUS FOOLISH foolish; silly; witless ...Bk1942 Amer. sl.
• PRIZE SAPPY foolish; silly; witless ...Bk1942 Amer. sl.
• PRUNY foolish; silly; witless ...Bk1942 Amer. sl.
• PUERILE childishly foolish; immature or trivial ...17C
• PUGGLED given to foolish behaviour ...1985 Sc. sl.
• PUPPY-SHOW foolish, ridiculous ...L19 W. Indies
• RADGE of an idea or situation: foolish, silly, absurd ...1961 sl.
• RADGY of an idea or situation: foolish, absurd ...1990s sl.
• RAFFLE idle; foolish ...Bk19C Eng. dial.
• RALPH weak, silly, foolish ...Bk1905 Eng. dial.
• RATTLE-BEANED foolish; silly; witless ...Bk1942 Amer. sl.
• RATTLE-BRAINED talkative; flighty; harebrained; silly; stupid; prone to confusion; foolish; unable to concentrate ...1868 Sc.
• RATTLED confused; foolish; silly; confused by excitement ...20C Amer. sl.
• ROCKED IN A STONE KITCHEN said of a fool, his brains having been disordered by the jumbling of his cradle ...1809
• SACKLESS lacking common sense; silly; foolish; stupid; thoughtless; useless, awkward ...1878 Sc. & Eng. dial.
• SAGGER-YEDDED stupid, foolish ...Bk1904 Eng. dial.
• SAKELESS without sense or gumption; silly, foolish, lacking drive or energy, sloppy, careless ...1820 Sc.
• SAMMY foolish, dull ...E19 sl.
• SANNOCKING silly, foolish ...1893 Eng. dial.
• SAP-HEAD foolish ...M17 sl.
• SAP-HEADED foolish, silly, stupid, witless ...1665
• SAPLESS foolish, silly, witless ...Bk1904 Eng. dial.
• SAPPY foolish, silly, witless ...1670
• SAPPY-HEADED simple-minded, silly, foolish ...1881
• SART foolish, imbecile, daft ...1885 Eng. dial.
• SAUFFLING foolish, weak ...Bk1904 Eng. dial.
• SAUMPY weak-minded, foolish ...1856 Eng. dial.
• SAWNEY foolish, stupid, weak; foolishly sentimental ...1894 Eng. dial.
• SCRAMBLE-BRAIN foolish; silly; witless ...Bk1942 Amer. sl.
• SCRANNY crazy, mad, distracted; simple, foolish; bewildered ...Bk1904 Eng. dial.
• SHALLOW-BRAINED † having no depth of intellect or understanding; foolish, empty-headed
• SHALLOW-PATED having no depth of intellect or understanding; foolish, empty-headed ...arch.
• SHAY-BRAINED foolish, silly ...1806 Eng. dial.
• SICK OF THE SIMPLES foolish ...18C colloq
• SIL(L) foolish ...1930s sl.
• SILLY-ARSE stupid, foolish ...1910s sl., chiefly US
• SILLY AS A WET HEN extremely foolish, silly, or stupid ...1980s NZ sl.
• SILLY AS A WHEEL extremely foolish,  silly or stupid ...1950s Aust. sl.
• SILLY-ASS stupid, foolish ...1910s sl., chiefly US
• SILLY-ASSED stupid, foolish ...1910s sl., chiefly US
• SILLY-BORN stupid, foolish ...1940s sl.
• SILLYISH * somewhat foolish ...1761
• SIMP foolish ...2000 US sl.
• SIMPY foolish, gullible ...1940s sl.
• SLAP-HAPPY foolish; silly; witless ...Bk1942 Amer. sl.
• SLAPPY foolish; silly; witless ...Bk1942 Amer. sl.
• SLUGGY foolish; silly; witless ...Bk1942 Amer. sl.
• SLUG-NUTTY foolish; silly; witless ...Bk1942 Amer. sl.
• SNEPE * foolish, silly ...a1250
• SPOONY foolish, silly ...1805 colloq.
• SQUIRISH foolish ...L18 sl.
• STEAMBOATS foolish, silly ...2000 UK sl.
• STULTILOQUENT * talking foolishly; given to silly talk; babbling ...1845
• STULTITIOUS † foolish, ridiculous ...1547
• STULTY †* foolish, stupid ...1387-8
• TABETLESS heedless, foolish, silly ...1786 Sc.
• TACOU foolish, stupid ...20C W. Indies sl.
• TAFFEREL thoughtless, foolish, giddy; also, ill-dressed ...1822 Sc.
• TAIVERT stupid, foolish, muddle-headed, slow-witted, half-witted ...1818 Sc.
• TAKE YOUR PICK stupid, foolish ...1998 UK rhyming sl. for 'thick'
• TAPETLESS heedless, foolish, silly ...1786 Sc.
• TAPIE foolish, awkward, slovenly, foolishly thoughtless ...1706 Sc. & N. Eng. dial.
• TAUPIE foolish, awkward, slovenly, ill-conditioned; foolishly thoughtless ...1706 Sc. & N. Eng. dial.
• TAUPY foolish, awkward, slovenly, ill-conditioned; tawdry ...1823 Sc.
• TAWPIE foolish, awkward, slovenly, ill-conditioned, foolishly thoughtless; tawdry ...1706 Sc. & N. Eng. dial.
• TAWPY foolish, awkward, slovenly, ill-conditioned; tawdry ...1823 Sc.
• TEWITISH wild, foolish ...Bk1905 Eng. dial.
• THICK foolish, slow-witted, unintelligent, stupid ...a1800 sl.
• TIN-EARED foolish ...1930s sl.
• TITTERY foolish; silly; witless ...Bk1942 Amer. sl.
• TOMFOOL extremely foolish
• TUNKLE-HEADED foolish, stupid ...1903 Amer. dial.
• UP AGAINST THE WALL foolish, stupid ...1960s US college sl.
• VAIN † of persons: devoid of sense or wisdom; foolish, silly, thoughtless; of an idle or futile nature or disposition ...1390 rare or obs.
• VOLAGE giddy, foolish; fickle, inconstant, inconsiderate ...a1366
• VOOM-VOOM foolish; silly; witless ...Bk1942 Amer. sl.
• WANWITTY † foolish ...a1500
• WOODENTOP foolish ...1983 UK sl.
• WRONG silly, foolish; extremely eccentric, or slightly mad ...1920s Aust. sl.
• YAPPY foolish, soft; idiotic ...M19 sl.
• YAWNEY simple, foolish ...19C sl.
• ZATHY simple, foolish ...Bk1904 Eng. dial.
 
FOOLISH - nouns
• IDIOTICALS foolish things; nonsense; cheap, trashy news ...1826 Sc.
 
FOOLISH - phrases
• MORE F THAN R. 'more fool than rogue'; originally and chiefly used of a servant ...M19 sl.
• YOU'RE OUT OF YOUR TINY MIND you're crazy, foolish, mad ...1970 UK sl.
 
FOOLISHLY - adverbs
• CANGLICHE † foolishly ...a1225
• DAFFY-LIKE foolishly, like an idiot ...Bk1900 Eng. dial.
• DAFTLY foolishly ...1787 Sc.
• DAWKINLY stupidly, foolishly ...1750 Eng. dial.
• GOOK-EYED stupidly, foolishly, vacantly ...1950s US sl.
• HEARTLESSLY † foolishly ...1611
• LEWDLY † ignorantly; foolishly ...c1380
• LIKE A MONKEY TRYING TO BUGGER A FOOTBALL very clumsy; foolishly ...1965 Amer. sl.
• LIKE A MONKEY TRYING TO FUCK A FOOTBALL very clumsy; foolishly ...1981 Amer. sl.
• LOOBILY foolishly ...M14
• MAZE-LIKE stupidly, foolishly; like a madman ...1866 Eng. dial.
• OAFLY foolishly, absurdly ...Bk1905 Eng. dial.
• VAINLY † foolishly, senselessly, thoughtlessly ...1588
 
FOOLISHNESS - see FOOLING
 
FOOLISHNESS - verbs
• COME OFF THE GRASS to stop talking foolishness ...a1891 US sl.
 
FOOLISHNESS - phrases
• BORE FOR THE SIMPLES refers to a stupid person; the idea is that a hole in the skull might let some of the foolishness out ...1916 Amer. dial.