|Origin:||tacky 'horse in poor condition' (1800-1900).|
if something is tacky, it looks cheap or badly made, and shows poor taste:
2 especially American English
showing that you do not have good judgment about what is socially acceptable:
It's kind of tacky to give her a present that someone else gave you.
The paint's still slightly tacky.
—tackiness noun [uncountable]