Are yams and sweet potatoes the same?
"sticky," 1788, from tack (n.1) in the sense of "an act of attaching temporarily" + -y (2).
"in poor taste," 1862, adj. use of tackey (n.) "small or inferior horse" (1800), later "hillbilly, cracker" (1888), of uncertain origin.
Inferior; shabby; vulgar; icky, ratty: She talked in a manner that would be considered a bit countrified, if not slightly tacky/ The girl's hunger for validation, however tacky
[1862+; apparently fr tacky, ''small, useless horse,'' and later ''hillbilly, cracker'']