Webster's Revised Unabridged Dictionary · 1913

Tacky

Tacky , adjective

[Compare Techy, Tack a spot.]

Sticky; somewhat adhesive;; -- said of paint, varnish, etc., when not well dried. [United States]

Tacky , adjective

[Etymol. uncert.]

1.
Dowdy, shabby, or neglected in appearance; unkempt. [Local, United States]
2.
In poor taste; appearing cheap; gaudy; unstylish. Broadly used to describe objects whose style is disapproved of by the speaker.
3.
Tactless; in poor taste; -- used to describe behavior.

Tacky , noun

An ill-conditioned, ill-fed, or neglected horse; also, a person in a like condition. [Southern United States]