An acronym for the phrase, "Put It In Your Mouth." Referring to getting head. Also can be used an exclamation.
Guy A: Dude you just have to go up to her and say, PIIYM!
Guy B: That sounds kind of rude man.
Guy A: That's the point!
Guy B: That sounds kind of rude man.
Guy A: That's the point!
by PIIYMbabe! July 28, 2009