Sarcastic comment to insinuate the awesomeness of a specific event, situation, action, circumstance, other noun, etc. Can be used in both a positive or negative context, but usually the latter.
Dude, mandatory community service is smokin' balls!
Man, your pictures from last night were so f'ed up; what were you smoking?
Dude, smokin' balls!
A phrase used to describe when a person doesn'tknow what the hell they're talking about but they keep talking. Also applicable when a person messes up their speech factually or grammatically.
Guy 1: "Hey, I think that JoJo's Bizarre Adventure is a really good anime"
Guy 2: "Quit Smoking Balls, Gavin"