Top definition
An explosion of jizz in your pants. Literally!
That chicks so fine cumbustion was unavoidable!
Dude, go change!
by CWeed, Browniemixx, Echo January 11, 2009
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May 16 Word of the Day
Abbreviation for:

I DON’T GIVE A FUCK WHAT THE CDC SAYS YOU BE WEARING YOUR MASK
Karen: The CDC says we can stop wearing ma
Frank: IDGAFWTCDCSYBWYMFM !!!!!!
by Callmemaybe69 May 14, 2021
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2
When a dude busts a nut so fast that the exothermic release triggers a chain reaction in which cum accelerates exponentially and shoots out the dick hole. Cumbustion
Jimmy: I had Sara rub me out resulting in a cumbustion right in her face.
Bob: You're weird, man
by testicle juice October 02, 2020
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