When a naked man swings his hips from side to side - causing his penis to alternately hit each of his thighs, going from side to side.
by Lotta fra Bråkmakergata August 13, 2007
by Chris April 14, 2005
generally found on extremly fat people, its a huge sagging boob, or a belly roll or rolls and other things that fit in this description above. when whalelike people walk around, these items apear to (flap), due to air resistance and gravity, much as a birds wings flap or a whale flipper flip and/or flap. sometimes these things all flap/flip at once. this could be called a fat man's disco. amazingly, u get all this action just from walking!
that man just walked across the street, but it looked like he was flipping/flapping/rolling because all the flaps and flips made it look like he was dancing, unintensionally. When he made a turn to the left, all his flaps and rolls made him look as though he had a superpower of turning into tornadoes or spining around while walking straight
by slapapig September 28, 2003
The act of farting in someone's face, then immediately turning around and slapping them to bring them back to reality.
Jane kept running her mouth at me last night, so I had to give her the flap to let her know who the boss is.
Hey man, don't hang out with John, he's a flapper.
Hey man, don't hang out with John, he's a flapper.
by bob_stencil January 19, 2011
by Tylers88 August 3, 2017
1. She had no knickers on and you could see her flaps
2. Sorry I didn't come out with you guys last night... I flapped it!!
2. Sorry I didn't come out with you guys last night... I flapped it!!
by 123x April 20, 2011