look up any word, like the eiffel tower:
 
9.
Garland reference to unstable internet equipment that is continuously bouncing between an up and down state.
The telephone company's router was flapping so much that nobody could get connected to the internet.
by swanssy September 26, 2008
 
1.
shaking one's willy in an eccentric and exciting manner. often resulting in hilarious and wet consequences. can be used as a form of foreplay or to attract other people to engage in the mating process, much like a peacock displays her feathers to attract a mate. a male human will often display his willy in an appealing way to gain sexual prowess.
i am going to use my extreme flapping capabilities to attract a mate at the club tonight.
by sfccurtyla November 11, 2013
 
2.
alternate word to describe jabbing a nice booty
k-malz: i was flapping that booty at the gyzam
deemo: douchebaggg
enlo: spit roasttt meee k-malzzz
by perthlover321 June 26, 2009
 
3.
The art of smacking your erect penis against your inner thigh to the point of climax.
"I walked in on my brother flapping and listening to the audio of a slaughterhouse."

"I had to rip out all the leg hair on my thigh because they were covered in cum from me flapping."
by theflapmaster December 18, 2013
 
4.
The act of female masturbation. The female version of 'fapping' with reference to the flaps of the vagina.
Girl, I was flapping all night to fifty shades.

Summer to-do list: Slip, slop, slap and flap.
by SnowGirl October 02, 2014
 
5.
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.
He was standing there in the shower, singing and flapping!
by Lotta fra Bråkmakergata August 13, 2007
 
6.
An alternative to f**k.
That was flapping sweet!
by appleluvr24 April 15, 2008
 
7.
hovering around, not really doing much
yo, stop flapping about
by nark November 05, 2006