1) a person who desperately wants to be a popped-collar frat boy, but is a loser and poser. This individual spends his or her free time larping and playing rpgs while bullying any other nerds in the vicinity.
2) a nerd who attempts to elevate his social status by being a dick to other nerds.
Nerd 1: What the hell is up with that guy? He's gaming like such a douche!
Nerd 2: Don't bother with that nerd-thug, he just thinks he's better than everyone else here.
Nerd 3: I think he missed the irony that if he WAS better than everyone else here, he wouldn't be here all weekend swinging foam at people in retarded costumes, he'd be at a frat party with all the bros he tries so hard to imitate.