also SLAMMOCKY, SLAWMECKY, SLOMMACHY,
SLOMMACKY, SLUMMACKY, SLUMMUCKY
1. slovenly, untidy; careless, sloppy ...1855 colloq. & Eng. dial.
2. of a person's body: soft and flabby, out of shape ...1861 colloq. & Eng. dial.
3. ungainly, awkward; characterized by clumsy or careless movement ...1865 colloq. & Eng. dial.
adj.1) probably from slummock (n. a person who is habitually negligent or lazy with regard to person appearance or household cleanliness) + -y
adj. 2 & 3) probably from slummock (vb. to walk or move in a heavy, ungainly, clumsy, or careless manner) + -y
FIRST DOCUMENTED USE
1855 - see EXAMPLE below
"...Why, Massa, de common slommachy way people ab ob boiling it on de cob; dat she said was only half a way. Oh, Lordy gracious, one way she wented, de corn was as white as snow, as light as puff, and so delicate it disgested itself in de mout..."
From: Nature and Human Nature, by the Author of 'Sam Slick, The Clockmaker'
- Thomas Chandler Haliburton