extra bedroom
phrase used in peer communication when attempting to convey your sense of morals and decorum when it comes to sleeping over at a "friend's" house.
Bob: "You're staying over at her house on the first date? You haven't met this girl but once."
Brice: "Yeah, it's cool she has an extra bedroom."
Bob: "Yeah right she has an extra bedroom. IN HER VAGINA."
Brice: "Yeah, it's cool she has an extra bedroom."
Bob: "Yeah right she has an extra bedroom. IN HER VAGINA."