An Idiot Genius is the Anti-Intellectual Intellectual.
John: He does absolutely nothing in school and is a fucking straight A-Student! Then he gets trashed almost every day of the week, smokes his brain to mush, fucks girls like there's no tomorrow, and still manages to do better in school than me! What the FUUUUUCK?
Jim: Lol u mad bro? He's just an Idiot Genius!