A play on the name "Vap-o-rub", a commonly used - smelly - Vaseline like gel used to burn the cold out of your nose. Due to it's pungent smell, it is instantly recognizable
Frat Guy 1: "Welcome to the Rapeitorium!"
Frat Guy 2: "Bro, this is just your bedroom."
Frat Guy 1: "Not once I get a drunk bitchup in it! Hahaha!" *Brofive*