When your mind starts thinking of all the bad things about life and your mind starts to scramble. Then you think of one amazing thing and BAM! you mindjizz and start to relax.
Guy: Dude, I was thinking about all the exams we have to do this week and then I remembered I get to bang Kelly tonight.

Guy2: DUDE, you totally just mindjizzed!
by chinoy January 14, 2010
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