Used by Idiots as a way of expressing the fact that: A) They have never touched a girl, B)They just Licked a girl out, and C) They have no clue that you can not thrust your face into a girls crotch as if you were giving her a blowjob.
Idiot 1: Dude I just Mouth Banged my girl friend!
Guy: Yeah I was... wait, Mouth Banged, your Girl Friend?
by vectorspyke July 10, 2009
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Did you mouth bang last night at the party on the dance floor?

Yeah we totally kissed WITH tongue.
by mouthbanging101 January 19, 2016
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