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 April 26, 2016