Roast Beef Syndrome 

A brown discoloration on the vaginal lips, often seen on porn stars.

When I went down on Tina, she had some wicked Roast Beef Syndrome that reminded me of an Arby's Big Montana

Roast Beef Syndrome by Scott Riel February 14, 2004

R.B.S. (Roast Beef Syndrome) 

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.

R.B.S. (Roast Beef Syndrome) by GuCcI May 27, 2013