Flyswatter Ass Share definition Flag A girl's ass when she tries too hard to make it swish because they think it makes them look sexier. DAMN! That chick has such a flyswatter ass! It's about to fall outta her booty shorts! Flyswatter Ass by AirplaneEatsSky June 14, 2011 0 0 Get merch Get the Flyswatter Ass mug. Buy Now — $32.95 See more merch