Flap 

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

Flap by slapapig September 27, 2003

Flap 

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.

Flap by bob_stencil January 20, 2011

flap 

labia or failure... you decide

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!!

flap by 123x May 11, 2011

Flap 

A hip alternative to pussy, box, snatch, and cutty. Flap refers to more than just the beef curtains, it covers all areas of one's womanhood.

"Me and DeAndre about to hit the town scouting for flap"

"I creased that flap last night dawg, and I didn't even have to wear a flap jacket"

Flap by Dirk Daddy August 18, 2011

Flap 

The sound one makes when masturbateing to porn on a laptop computer. Also can be the sound mad when your pounding a honey hole and your ballsack and ramrod slam against those meaty lips.

We got home early only to walk in our apartment and hear the sound flap flap flap flap flap flaaaaaaap flap of Tim our virgin roomate wackin off to porn on his laptop.

Flap by FLAPFLAPfromNC December 27, 2011

Flap 

A quarter gram (250 mg) of heroin.

"Can you do me a flap for $40?"

Flap by RealFamous August 28, 2016

Flap 

Noun: a movement of a ballsack from side to side or up and down.

Verb: the act of using your ballsack to hit something

Tommie flapped me with his ballsack.

I’m gonna flap that bitch in the face.

Flap by Electrified22 October 15, 2018