Flap Juice

When your balls sag down low enough to cover your asshole like a flap and you let a wet fart leaving behind some juicy residue on your balls called flap juice.

Pull over I need to wipe off this flap juice from that fart I just let out.

flap cracking

The act of pouring pancake batter down your butt crack, heating up a curling iron and sticking it between your buttchecks to make flapjacks.

My wife and I did some flap cracking last night. It was sexy and delicious.

I can't get off anymore unless we do some flap cracking beforehand.

Sack Flapping

The sound your ballsack makes when pounding a tight slizz from behind; a good sack flap goes to a beat and makes a soft thumping noise... & can lead to minor bruising and irritation of the stomach region of the partner whos tight slizz or smelly balloon knot is being ravaged

Kelly: "Whats that on your stomach?"
Sara: "I had a good Sack flapping last night"
Kelly: "Oh i got sack flapped last wednesday; and his beanbag bruised the hell out of my tummy "

chastity flap

A protruding belly, or gut, hanging over one's genital area, preventing that person from having sexual relations.

Did you see the size of that chastity flap on Travis's sister? She's never going to lose her virginity.

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spam flap

Derogatory term for the labia, the lips of the female clitoris. It can be used in several different contexts.

You're just a fucking spam flap.

She's such a slag I can see her spam flaps from here, flapping i the wind.

SPAMFLAPS! (when something goes wrong)

Flap Jacker

After a night of hot sex, your girl wakes up and makes you flap jacks and proceeds to give you a hand job while serving you breakfast in bed.

My cock n balls are raw today braaaahhh. Banged her ass all night and she finished me with a flap jacker this morning.

flap rot

when a womens vaginal lips are rotting away or she has a vile STD

'that old bint has a serious case of flap rot'