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Having an extreme fixation, usually sexually satisfying on something, for people who are skilled at mathematics.
Teacher : "The opposite of an intregal is a derivative"
Dude 1: "Dude, did you see that girl orgasm in the back of the room?"
Dude 2: "Yeah dude, I'm pretty sure she has a math fetish"

Chick 1: "He was so uncool until he talked math to me. We had sex after he explained a calculus concept."
Chick 2: "you totally have a math fetish"
by ihaveamathfetish October 12, 2009
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