noun - A halo 3 player that has become so good at the game that they cannot give it up, and move on to Reach.
Bob - C'mon Jim, come play Halo Reach with us!
Jim - I can't guys, I'm on a 15 game win streak and my EXP is almost maxed out.
Bob - ........Jim...that shit doesn't matter. No one plays Halo 3 anymore. This is 2011 man! Quit being a Halo 3 Bastard!