This term can mean something is sticky... But how is this adjective used in other situations?
Tacky 趣味低下的,俗气的
Anna: Jonathan! Did you buy your mom that tacky dress she wanted?
Jonathan:You mean the one with the stripes and the polka dots and the enormous bow tie on the shoulder? Yeah, I did.
Anna: Seems like she has her own idea about fashion.
If something is described as tacky, that means it is of poor quality or just shows bad taste. A person can wear tacky clothes, tell a tacky joke, or read a tacky romance novel. Fortunately, I have never done a tacky thing in my life.