No matter what you look up on Urban Dictionary, at least one definition WILL be an absurd sex move. Usually involves taking a dump on your partner.
Background Kid 1: Dude, I looked up "Porcupine" on Urban Dictionary and it was a sex move!
Background Kid 2: If I was any less surprised right now my brain would shut down.
Background Kid 1: I looked up "Urban Dictionary" and that was a sex move, too!
Background Kid 2: *dies*