1. a trifler ...1622 obs. rare
2. a pair of bones held loosely between the fingers on which boys
play a kind of tune; castanets ...1888 Eng. dial.
3. a fussy, officious person ...1960s US sl.
from knick-knack + -er
FIRST DOCUMENTED USE
1622 - see Example below
"...Other kind of knick-knackers there are, which betwixt knaue
and foole can make an illfauoured passage through the world."
From: Strange News Ovt of Divers Covntries
By: Nicholas Breton, 1622
• A New English Dictionary on Historical Principles,
James Murray, 1887-1933
• The Century Dictionary and Encyclopedia,
William Dwight Whitney, 1889-1891
• A Supplementary English Glossary, O. Davies, T. Lewis, 1881
• The Encyclopaedic Dictionary, Robert Hunter, 1879-1888
• A Glossary of Words Used in the Neighbourhood of Sheffield, Sidney Oldall Addy, 1888
• Cassell's Dictionary of Slang, Jonathon Green, 2000