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sex that is so good you've gotten off before you have even started
as in a Prince song, Matt Damon and all of the band filter....because we all have a really dirty mind
by badfish May 09, 2003
To spontaniously burst into flames
Wouldn't it be cool if that person just spontaneously combusted?
by Anonymous July 30, 2003
My pre-teen daughter explained spontaneous combustion as:

a random and sudden outburst of laughter
Suffering from spontanious combustion usually stems from nervousness or excitement.

This girl in dentention was given almost 2 months because she went into a spontanious combustion situation.

by G's Spot December 03, 2005