flapgapper 

a big mouth with no ass to back it up

kurt... come on... show me somethin...what can you do besides run ya fuckin flapgapper?

flapgapper by Julipepper April 27, 2005

Flaplapper 

Woman who eats or licks pussy.

That bulldyke is a flaplapper.

Flaplapper by icloseem January 11, 2009

flapapper 

somethin that doesnt propel anything but resembles a propeler and goes flapapapapapapapapapp.

That dude has a flapapper on his hat.

flapapper by B-Rog June 7, 2009