Shitaneous Combustion 

Unexpected and severe gassy diarrhea.

After eating lunch at the taco truck down the street, I had shitaneous combustion when I got back to work.

Shitaneous Combustion by Htos_Drol November 27, 2012

Preventing Spontaneous Human Combustion

To let one rip
First coined on the hit show:south park

ex:

Man:Dude that was sick it smells like eggs...
Dude:Hey man just preventing spontaneous human combustion here...

Preventing Spontaneous Human Combustion by Fucktarded Scarecrow August 1, 2009

Anal Combustion

Any form of explosion just inside the anus. Could be the result of inserting and igniting gasoline or gunpowder, attempting to light a fart, or that Mexican food from yesterday. Depending on the strength of the sphincter, severe anal combustion may result in blowing out the anal socket or rupturing of the rectum.

I had pretty bad anal combustion after that spicy 15 bean soup--it almost blew out my sphincter!

Anal Combustion by b007y514y3r March 11, 2016

spontaneous human combustion 

to suddenly, and with no apparent reason, burst into flames and within minutes become a human cinder. a.k.a. SHC

defoe was running so fast towards the opponents penalty area that he suddenly suffered an acute spontaneous human combustion

spontaneous human combustion by theWestHamfan November 4, 2003

Combustion 

Combustion is a better, more accurate term for lit. Or alternatively that which is lit, cool or awesome.

“Your outfit is combustion”

Combustion by Annajaye November 12, 2022

Testicular Combustion 

If a man decides to not jack off for a very long time, an abundance of semen will collect inside the testicles. Once the semen level reaches a certain point, the testicles will combust.

Kid 1 - Yo man you been jackin it?

Kid 2 - Nah dude I stopped doing that shit

Kid 1 - Watch out for testicular combustion!

Testicular Combustion by ajay69 June 30, 2011

Combatious 

When something is as decadent as it is awesome

“Damm that shit was combatious” , “Them tings fye as hell, dem bitches combatious!”
Origin - Jesse's House

Combatious by TomPolites October 8, 2021