Bird Flap

Fat guy's belly below his belt (similar to Bunt or Crotch Belly)

That dude's belt is pushing down his bird flap

by Joe Carott December 23, 2008

Bird Flap

A dance typically conducted while pre-gaming before the bar.

"I feel like tonight's gona be a great night downtown, Ryan is already drunk and doing the bird flap!"

by MadPlayRK July 6, 2014