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.
Ewww I can smell that R.B.S. outside of your pants
Put that R.B.S right here.
by GuCcI May 27, 2013

The girls Roast beef au jus was so foul it looked like it could be put in a roll with some gravy, horseradish and a slice of provalone cheese.
by Murph McGirt December 9, 2003

Stacy came home after a girls night out last night and I wanted to surprise her, but ended up eating a roast beef sandwich with Mayo instead! That cheating whore!
by Reversecougar00 December 22, 2022

Roast Beef Mud Flaps are the oversized lips of the vagina that resemble the mud flaps on a semi truck if they were made out of roast beef. This phenomena is often related to the woman having an excess of sexual partners, and/or extreme stretching by the use of sexual toys.
Chris: Hey man, did you end up hitting that last night?
Ken: Yeah, but it wasn't that great.
Chris: Why not?
Ken: Well, she had a massive set of roast beef mud flaps.
Chris: Were they that bad?
Ken: Yeah, it looked like she road a chainsaw to work everyday.
Ken: Yeah, but it wasn't that great.
Chris: Why not?
Ken: Well, she had a massive set of roast beef mud flaps.
Chris: Were they that bad?
Ken: Yeah, it looked like she road a chainsaw to work everyday.
by Queef Chief May 28, 2016

Labia with a tinge of brown. Though they may appear to be fresh roast beef, do not try to serve them on a po-boy with gravy. Roast beef drag lips are, in fact, stained vagina.
Your grandmother asked me to help her douche. But when I noticed she was kicking the roast beef drag lip, I gave her a cunt punt.
by Anne Marie Vandencunt June 11, 2006

by ThickBeepor December 28, 2021
