John "Man, I heard that once you hit the age of 60, you start to develop a flap pack!"
Chris "Isn't that true!"
Chris "Isn't that true!"
by Anal Asian June 30, 2014

The crusty film that forms made of sweat that collects under a breast, usually a large breasted girl, or woman.. or anyone who has breasts large or saggy enough to cause and form pockets, if its large enough to hide items, its large enough to collect dirt sweat lint and small creatures. Liken it to swamp ass or belly button lint..
Dude, she flashed us and under flap fell out.
Much to his surprise and horror when he got done licking there, there was some under flap stuck in his teeth
Much to his surprise and horror when he got done licking there, there was some under flap stuck in his teeth
by SLAA addict July 12, 2012

Sack Flaps are a rare genital disease that gives the unlucky victim an extra, saggier pair of nuts. This extra pair usually hangs lower than the typical pair.
by tambah May 1, 2024

a piece of Kangaroo meat cut into the shape of "piss flaps" and then tried to be fed to the naive English Pommy
by Colonel-Briggs November 17, 2011

As Jose was ass fucking Laura, he thought “thank god I have my balls as mud flaps. Otherwise that shit would have been everywhere.”
by Kelita554 February 7, 2023

The act of flicking external labia during foreplay. When done correctly it will increase blood flow to the labia and clitoris, causing a more intense and pleasurable sensation.
Flap flicking is often requested during oral sex.
Flap flicking is often requested during oral sex.
Trudi: Had the best sex with Greg last night; I love it when he gets things started with a good flap flicking. When I'm feeling like a naughty girl, I love asking him to flick my flaps.
by SexySmartandSweet December 3, 2019
