(F)lappy (C)unt (L)ips
Those 'wing like' structures attached to the vagina of most porn models you see these days. Believed to be stretching from too much sex or playing with themselves.
The FCL on that chick gives new meaning to stretch marks!
Who said butterfly? That FCL looks like a bald eagle!
Basically a person whos being a real bitch, and needs a stream of profanity directed towards them before they can realize how fucking soft they're acting
Danny: Cmon Rolf, lets go get some beers and watch the basketball game
Rolf: I can't, I need to consume less calories so I can stay in shape