look up any word, like blumpkin:
 
1.
To spontaniously burst into flames
Wouldn't it be cool if that person just spontaneously combusted?
by Anonymous July 30, 2003
 
2.
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
 
3.
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