A word not used very often. Used in replacement for the word emo. Can also be used for the word scene. Most of the time, the average 'Bang Bang Dude' has the emo hair or scene hair. Basically of the emo or scene decent.
Kid 1: Look at that guy.
Kid 2: That one?
Kid 1: Yeah, he is totally a BANG BANG DUDE.
Kid 2: No way!
Kid 1: Let's get stoned and sleep with him.