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A undercover nerd is someone that is secretly smart, but doesn't appear to be smart. A undercover nerd can also be known as a cheater when it comes to computer games.
ex:
Cindy Woom: You a cheater
Jeff Bundy: Don't hate me cause I am smart
Cindy Woom: Is cheating really smart?
Jeff Bundy: I don't cheat. I am a undercover nerd.
Cindy Woom: Lier, your a undercover cheater!
by Ub3r1im January 17, 2015
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