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1. A very prestigious title received when you have succeeded to bang a girl 9 consecutive times.

2. An Mk 9-banger flash-bang, one of the most loudest flash-bangs you can buy.
Guy 1: What'd you do with that chick last night?
Guy 2: I 9-banged her!
Guy 1: Holy fuck!
Guy 2: Behold! I am the 9-banger!!
by Try hard gamer November 08, 2011