Top Definition
Doing math for fun, enjoyment, entertainment and/or to pleasure ones self.
Dude1: Hey! whats that nerd over there doing with that calculator?
Dude2: Probably mathterbating
Dude1: Dude! sick he could at least go to the bathroom to do dat
Dude2: Gotta do what you gotta do
by SeakingFuckYeah! March 04, 2008

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The Urban Dictionary Mug

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The Urban Dictionary Mug

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