Booty Flaps in another word for ass or but cheeks. This is when a women has very round and perfectly shaped but cheeks. You can have small or large booty flaps but, to be a booty flap they must be of the highest quality of asses.
by Bucknizzle July 17, 2011
Booty flap is when a girl flaps there booty so hard that whoever watches it, gets a little funky when they watch it.
by Jimbocamjam November 22, 2021