a wise guy

wise guy

1. One who is sarcastic or makes jokes in an attempt to seem witty, usually to others' annoyance; a smart aleck. Joe is such a wise guy that it's hard to know when he's being serious. Every class seems to have one disruptive wise guy.
2. A mobster. I wouldn't bother those shady characters sitting in the corner booth—they're all wise guys.
See also: guy, wise

a ˈwise guy

(informal, disapproving, especially American English) a man who speaks or behaves as if he knows much more than other people: OK, wise guy, what do you think we should do then?
See also: guy, wise
References in classic literature ?
Makin' free to spit out what's in me," Matt said one day, "I beg to state that you was a wise guy all right when you paid the price you did for that dog.