Roast Beef 

When vagina gets fucked so many times that the inner lips begin hanging outside of the vagina itself. Called Roast Beef because the small thin flaps of skin look similar to the shit you see hanging from the bun of a roast beef sammich from Arby's

John: I was gonna fuck this bitch last night, but when she got her pants off, she has the most wicked Roast Beef I've ever seen!

Tom: Fuck man.

Roast Beef by TehCho March 2, 2008

cut off the beef 

..to get some serious pussy.

For example "last night that hottie gave me a cut off the beef."
OR
Girl, when are you going to give me a cut off the beef?

cut off the beef by T. Mann July 11, 2006

skin-beef 

Covertly engaging in sexual activity while in the direct proximity of others people.

1. They got away with skin-beefing in a packed room on Enemy at the Gates.

2. Doing stuff in a crowded theater is prime skin-beefing.

skin-beef by damnballs/vader/jim dangles August 6, 2008

roast beef 

a black chicks vaginal lips

The spreading of the vaginal lips when a woman gives birth and the baby's head is coming out.

I guess Joe brought home more than the deli- look at the roast beef on that chick!

roast beef by Sabertooth nigga November 30, 2004

clown beef 

Slang for marijuana.
Developed by Teresa and myself, way back in the day when we were freshman in high school (1998).

We're going to the beach tomorrow, so don't forget to pack the clown beef and some papers.

clown beef by Sarah Lambert March 3, 2008

ground beef

when a mans slong is so big it touches the ground

Zach's ground beef scares me beyond all reason

ground beef by catracho21 September 14, 2011

roast beef 

A vagina in which the inner lips hang out farther than the outer lips. This shit is straight NASTY

His ex has some roast beef

roast beef by - May 13, 2005