Labia majora and minora surrounding the exterior of the vagina.

When some little bitchboy is acting like a little tiny pee pee poo poo baby and messing up the group plans.

a) Aerodynamic devices found at the trailing edges of aircraft wings, used to augment lift at a lower speed during takeoff and landing.
b) The meaty lips you love to nibble on when you go muff diving

(N) A whore. Derived from the region of the vagina called the labia.

The term flap is mostly used to describe any slut, skank, bimbo, man/whore, player, skeez, etc.

Recently, however, the term may describe a social event or gathering.

It can be followed by a series of adjectives including, but not limited to: loose, big, little, stinky, sticky, pink, gross, etc.

(Adj) Flappy

(Adv) Flappily

They can either keep mud off your car, or envelope your knob.

Flaps are a part of womens genitila

A 'Flap' is the name derived for a woman who you wouldn't necessarily 'go out with' or 'date' but you'd definitely have sex with.