Flap Jacks 

A sex position which a female is mounted and faced forward towards the male. The male then grasps the ass cheeks of the female and bounces it up and down like they were flipping pancakes.

Damn boy I flap jacks the hell out of Tiffany last night. Her ass was flipping like pancakes.

Flap Jacks by Jacobthewolf September 7, 2012

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

flags 

Word used for stamps in Prison. (i.e. a flag is often pictured on a stamp)

I'll give you 5 flags for the old issue of Buttman.

flags by Chris to the Izz-H January 9, 2008

flap straps 

When a fat girls back fat bulges and or hangs over her bra straps

"Holy crap Kainalu's girlfriend has some mean flap straps!"

flap straps by Mauipino June 23, 2009

fapspuration 

That which inspires a hearty fap. Masturbation inspiration.

Thanks bro, the picture you texted me of that girl was some great fapspuration!

fapspuration by PowerFap October 24, 2011

fapshot 

A fapshot is when you see a super hot girl and take a mental photograph of it to think of later while your faping

"Damn look at that chick over there, thats faptastic"
"O shit, better take a fapshot"

fapshot by Sr.Ridiculously winning October 10, 2013

flap jackin' 

A term for a lesbian sex act similar to scissor sex where the action moves from side to side rather than back and forth. the term derives from the stacking of labia which resembles a stack of pancakes.

This scissor sex isn't hitting it, it's time for some flap jackin'.

flap jackin' by Gigantic Twerp August 14, 2014