When someone run's up on you and farts in your face.
Awwww, man Bobby was Rost Beef in the face by Jr.
by licksalotpuss March 20, 2009
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The outer labia of a well-endowed chick, otherwise known as a Meat Drape.

by Mikus February 7, 2003
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when you are eating a girl out on the thrag and you get a blood clot in your mouth and you eat it
i was eating here out and got some rost beef and ketchup
by k24civicboost August 4, 2009
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