Phenomenon in which any animal caught defacating on my lawn bursts into flames, and it wasn't my fault.
Bob: "Howdy neighbor! By any chance, have you seen my sweet little Sparky? He's been missing for two days now."

Jeffy: "Uhhh....uhhhhh....I didn't do it."

Bob: "What?"

Jeffy: "You're not gonna believe this: I was mowing my lawn the other day and...I smelled something...burning. I looked over to see poor Sparky engulfed in a ball of fire, yelping for help......but by the time I reached him he was utterly consumed and only his ashes remained. That's what happened to Sparky. I'm not lying, it was Spontanious Animal Combustion Bob."

Bob: ".............*gurgles*"
by Jeffy the Retarded Beaver August 15, 2007
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it Is a gay fighting move used during sex
Gary: “yo did you just use spontaneous anal combustion on that kid yesterday”
Peng: “ yes, is there something wrong with that?”
Liam and mai: “yes that’s fucking gay”
by Kim Hong Kong September 8, 2019
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An uncommon yet highly infectious disease characterised by the repetitive and highly explosive detonations released from one's rectum, often coinciding with a massive expulsion of shit and piss (shiss, or pisst if you prefer). Strangely, the sizes of the sudden shit-splosions have been measured to be over 10 meters long and contain more force and matter than the unfortunate individual could possibly house. Despite the disease being almost impossible to investigate, it is thought that the sudden force of explosive diarrhea rips a hole in the fabric of the universe, creating a small temporary wormhole allowing more shit to travel through. Some scientists theorise that if the disease was more closely understood, it is possible that it could hold the key to both interdimensional and warp-speed travel.
The exact origin of this disease of this is unknown, but it is theorised to either have been caused by the founding of Taco Bell in 1962, or the popularisation of commercial laxatives in the late 1920s.
Michael: Ah fuck man, the doctor has diagnosed me with Highly Combustible Fart Syndrome. He-
*FUCKING EXPLODES IN A MASSIVE SHOWER OF SHIT AND PISS, INSTANTLY DESTROYING EVERYTHING IN A 10 MILE RADIUS*
Devin, now covered in diarrhea: Bummer, dude.
by sussy among baka balls March 19, 2022
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It's a person so reckless that they're trying to get in fights and cause trouble for no reason wherever they go.
Yo I was at the bar last night with Johnny and someone stepped on his shoe and apologized but Johnny still hit him. That kid is a combustible ass nigga.
by Amerigo October 19, 2013
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A rapidly growing phenomena where a guitar in a public place inexplicably ignites, destroying the instrument and often severely injuring the person holding it.

Most theorists agree that it is a karmic occurrence, brought about by the disruption of peace in the universe, by a growth in the crust punk trend, specifically in the American Midwest.

Guitars tend to explode at a high enough temperature to ignite dirty clothing and greasy hair, so it is typical for the person holding to guitar to catch fire as well. Not surprisingly, there has never been an incident recorded where someone has tried to extinguish a victim of SGC, though many have admitted to thanking God after witnessing the miracle.

Researchers have been trying to establish a cause-and-effect relationship between SGC and the Mayan prediction of the 2012 apocalypse. Nostradamus' prediction has already been connected when astronomers discovered a constellation depicting SCG, perfectly situated with the predicted alignment of the planets on the day of the Rapture.

The majority of recorded cases have occurred in coffee shops, to victims who have been described as crust punk, gutter punk, and hippy.
When the crust punk's strumming was brought to an overdue end by Spontaneous Guitar Combustion (SGC), the entire coffee shop applauded.
by the 1,000wordsmith December 22, 2009
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A gesture done by moving the hands from the chest outward, making it clear to someone that you wish to fight.
Dude! Dustin was totally up in that guy's face with his lung combustion mimification!
by Dustin Schmeitenhowser July 19, 2007
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