(Verb) Nobody knows what it truly means, though it sounds like a slang term for some form of sexual activity.
“I really want to bust a flap right now.”
“Hey, Ryan! Want to bust a flap with me?”
“I’m going to bust her flap(s) next time I see her.”
“Hey, Ryan! Want to bust a flap with me?”
“I’m going to bust her flap(s) next time I see her.”
by ⠀ ⠀ ⠀ January 16, 2020
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