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1.
Someone who likes nerdy things like pokemon games or star wars but is still popular and parties and hooks up.
Person 1: Ben fucked Sally and then as soon as he was done pulled his gameboy out and started playing pokemon.

Person 2: He is the biggest power nerd
by OneBadMotherFuckker August 19, 2008
 
2.
Someone who is extremely 'nerdy', or generally unliked.
That kid is such a power nerd.
by Banana B. May 22, 2005