When a females pussy lips are so used up they reseble a arby's roast beef sandwitch
I went to the strippers last night , and this stripper had Arby's Roast Beef Special
by AntonioSancho August 23, 2006
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Oversized, over-used, stretched out vagina lips, hanging from the crotch area, resting on the inner thigh, as if to be an open faced roast beef sandwich.
When your at a party, you meet a chick, you stick your hands down her pants, and there's more meat in your hands than in hers. That's open faced roast beef.
by BT Cruiser October 30, 2007
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When a girls pussy lips resemble that of roast beef. They r brown and loose.
Damn bitch u some fine R.B.S. (Roast Beef Syndrome)

Ewww I can smell that R.B.S. outside of your pants

Put that R.B.S right here.
by GuCcI May 20, 2013
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When a botha pulls huge pussy lips over a bitch's head and beats his cock violently off her forehead.

Yo, I pulled a Roast Beef Slapdown on dat hoe cuz she took my welfare check.
by Tim S. Trickler February 6, 2009
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