Top Definition
Original meaning: Mind-masturbate or masturbate with your imagination or mind.
Better used as: have to think so hard about something that it's almost like you have to masturbate with your mind.

Or simply use the short MM for mind-masturbate.
Bill: Dude, what's up, you look fuck-up!
Gabe: Man, the exam was so hard, I had to minsturbate the answer!
by benweiss9 September 10, 2010

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