Muffler Flap

When your inside a chick and your ball sack covers her butt hole as she farts, causing your ball sack to vibrate acting like a muffler flap.

I hate when my wife uses my ball sack as a muffler flap!

by BHS Master September 9, 2019

Batman flapping

Two gay male Asians that make love after eating sushi while wearing costumes

I bet the are gonna go do some batman flapping

by Unknown xoxo June 27, 2016

Crotch Flap

Is when Ania hits the net and grunts like a pig... and the power puff girls lose!!!

That was a crotch flap shot she's so German like!!

by Arm Head June 1, 2018

Flap tash

When the female looks down as the male licks her out and appears to have a pubic hair moustache.

"I hadn't shaved in a while and when I looked down he had a right flap tash"

eg. go to google, image search, moustache, top right hand of 1st page.

by Captian nobwash December 11, 2002

Jack Flapping

The action in which guys shake the excess urine off of their penis after urinating.

I hope you did not forget to do your Jack Flapping

(this was Made by Jarryd Hardam)

by Somnili June 30, 2016

fart flap

The triangular rear side window in some smaller cars having a hinge on the front edge and a latch on the back edge that opens about 2 inches.

That fart is horrible! Open the fart flaps!

by Lord Windowsmear June 29, 2014

flap scrubbing

Literally, manual female masturbation.
Or figuratively, wasting time, as in goofing off,
fucking off, or the feminine version of jerking off

She's obviously so horny it's interfering with her work. She needs to go home to scrub her flap.
Please take a break from your flap scrubbing and bring me a beer.

by Shayman Bob June 7, 2011