Female who enjoys playing video games. She varies little from the average gamer, though she may be less likely to communicate verbally to ward off advances or other unpleasant speech of the male gamer. She can be found playing any game genre on any platform. It is possible to have played with/against several dozen or more gamer girls per day without your knowledge and can be just as "hardcore" or "noobish" as the next guy.
The gamer girl can vary in age and maturity from the cashier at your local grocery store, to the milf down the street, or even the CFO of a large company. Many times, she will be playing from her college dorm before heading off to go to classes or the party her boyfriend is throwing.
Guy1: OMG! I just got owned by that guy.
Guy2: That's my sister. She's a gamer girl.
Sister: No, you can't have my number.
Guy1: But, but, but..
Sister: No, I won't send you my picture either.