"&" / "Japan Break Industries" - Fake Geek Girls

See more on Know Your Meme

http://thebestpageintheuniverse.net/c.cgi?u=youre_not_a_nerd
A good article related to this sort of thing. I would go so far as to say that there are males who do it to.

True nerds rarely acknowledge how nerdy they are because they're too busy being nerdy and being so enthralled in whatever they're doing, sometimes to the point of ignoring friends, family, and personal hygiene, hence the lonely, smelly neckbeard stereotype. A true female nerd wouldn't hop up on her soapbox and go:

"GIRL GAMERS CAN GAME JUST AS GOOD AS GUYS LOL I'M SO GEEKY. I PLAYED MARIO ONCE. EVEN THOUGH IT'S NOT ACTUALLY MINE BUT MY BROTHER'S I'LL ACT LIKE AN ATTENTION WHORE AND COMMAND TO BE TAKEN SERIOUSLY AT THE SAME TIME."

Just search for #nerd or #suchanerd on twitter and you'll see the kind of people that the "Idiot Nerd Girl" meme is aimed at.