from the Sopranos series, meant to reproduce the sound of "stu cazz " from the Naples dialect when read out loud, originally from the Italian " 'sto cazzo " (short for " questo cazzo").Literally "this dick", this term has no relations with other body parts such as balls or anything else "cazzo" only means "dick". Seriously I'm from Italy, born here, the other definitions are pretty dumb.It's used in Italy mostly as a dumb joke when one asks a question that implies the other person to ask another one then he replies " 'sto cazzo" to mock the guy.It's also used as a reply to dumb questions especially when the answer is obvious.