mod. cheap; crude. : That was a tacky thing to do to her.
mod. alcohol intoxicated. : Tom was a little tacky, so he gave me his car keys.
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition. Copyright 2007. Published by McGraw Hill.
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Word Origin & History
tacky (1)
"sticky," 1788, from tack (1) in the sense of "an act of attaching temporarily."
tacky (2)
"in poor taste," 1862, adj. use of tackey (n.) "small or inferior horse" (1800), later "hillbilly, cracker" (1888), of uncertain origin.