Top Definition
Is someone you clearly aren't dating in real life and you clearly aren't dating to help you in math class (for you are definitely the intelligent one of the two). A math boyfriend is someone you are using just to give you the much needed attention you are lacking and to give you the idea of actually being in a relationship, in which there is seriously no commitment. Basically making you a needy douche.
You: "Oh hey math boyfriend!" (Hugs) "I really missed you!"
Math Boyfriend: " how do you do number seventeen on the last set?"
by zclotr March 07, 2011
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