When a guy's Dick is so big that it rubs on the inside of a girls ribs.
Guy 1: "I ended up going home with Casandra last night."
Guy 2: "What? You mean that midget from the circus? She was 3 and half foot tall!!"
Guy 2: "Did you Fuck her?"
Guy 2: "Yah! It was tough at first, I totally gave her a Rib Job!"