The act of instant male orgasm upon seeing something insanely hott.
When Lauren and Silvia took their clothes off, Patrick experienced spontaneous cumbustion.
de Sivv Vicious 23 mars 2008
3 more definitions
The act of two males performing a donkey punch and white dragon in unison on a female during an mmf.
"We gave Dorothy a spontaneous cumbustion last night. Her head exploded and a geyser of blood and cum splattered the walls."
de Gide 2 octobre 2006
An unexpected ejaculation
Jill was pissed Randy was premature last night. Jill said he suffers from Spontaneous Cumbustion.
de PSpin420 1 novembre 2009
Cumming without being aroused and with no sexual provocation.
As the airplane took off, Bob spontaneously cumbusted.
de tanukisanyo 9 mai 2005