Definitions by Buttl0af

butt flap

When a person's butt is so flabby that it hangs low to create a curtain of flabby butt. Otherwise known as a butt curtain.

Trisha: That gurl does not have the bod to pull of those bootay shortz.
Dee-bop: Tell me about it! I can see her butt flap from here!

butt flap by Buttl0af June 29, 2013