Yet another slang term for vagina, cunt, twat, pussy, etc etc
1.

Guy 1: "Dude I scored with that blode chick from the bar last night"
Guy 2: "Hell yea man did you get into her beef mitten?"
Guy 3: "For sure. Fit like a glove"

2.
Guy 1: "Hey I cant go out tonight guys."
Guy 2: "Come on man stop being such a beef mitten."
by mustbetom December 2, 2013
Get the beef mitten mug.