quad butt

when your underwear is so tight your asscheeks become four instead of two
booty
butt
ass
camel toe

"omg, did you see sarah's quad butt through her leggings? "

Quad Volley

When four guys line up and cumshot on a girls face at the same time, this can also be called a Four Man Firing Squad

Hey Brian I heard you Ben, Jake, and Noah Quad Volley’d Victoria yesterday, how was it?