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To perform an act of geekness but which impresses those that aren't geeks, and which evokes a reaction of surprise and delight. The essence of performing nerdy or geek like acts which are considerd cool by non-geeks.
"I showed this guy how to format all his pix at once and he was impressed by my geekcool"

Geek: "Did you know if you use this function you can format all your digital pix at once?"
Non-Geek: "Cool!"
by mccuzzle May 13, 2009
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