This is achieved when the inner labia (typically of a fat woman) sticks out to the side and looks like a uvula. It is especially common for the accompanying odor to be the worst thing you will ever smell in a thousand lifetimes.
"I figured I'd take that whore to a cheap motel, but when she took her pants off my eyes started to sting so I got the hell out of there because I was pretty sure I was in for a busted-out puss flap."
by Des Long November 16, 2012