Useless dick flap

Flap of skin removed during a bris

That guy is an useless dick flap, too bum to accomplish anything

ninja flaps

A female ninja. A woman well versed in the dark art of ninjitsu. An assassin of the fairer sex.

Bruce Lee: Fuck it...the evil triad are using a virtual army of deadly ninja flaps..
Friend: We are fucked now!

flapping beautiful

Having beautiful flaps - also know as the lips of the vagina (actually it's the vulva and the outer lips are the labia but let's not further confuse one of the greatly misunderstood naughty bits).

-Girl, you're so flapping beautiful.
-What??
-Them flaps, flawless.

Mat flap

When you slam your girl onto a mat/carpet and have sex with her.

Dude I just pure mat flap her and her booty shook.

guinea flaps

Also know as roast beef or bacon in the south. Guinea flaps are long flaps of skin usually dark in color that hang from a mud crickets vagina like a dirty set of trailer house curtains, normally caused from severe over usage of the female anatomy.

I was totally into her, until I had to hold her guinea flaps up to get in her lady parts....

flap jappin

to pull the labia majora outwards while performing cunnilingus and frantically slap them together

she: what the fuck are you doing down there?!
he: oh baby, just flap jappin this mutha fucka.

Poon Flap

When the crease underneath the muffin top smells like cheese

Bro¹: yo i was with ogirl last night and she had a "poon flap"
Bro²: lmao damn Foo, so what yall do then?
Bro¹:asked her if she wana take a shower with me lmfao