A person who is addicted to games. They usually respond to names like Mario, and Luigi, yet are often confused of who said it. Usually they never respond to their own names. They play games for hours on end until their eyes hurt and they are forced to quit, due to not blinking while they are intensely playing the game.
Person: Hey what's up gamer?
Gamer: Nothing much.
Person: Hey what's up allen?
Person: Hey what's up Mario?
Gamer: Luigi did you just say my name?