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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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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I spontaneously combusted a nut in front of my crush

He spontaneously combusted a nut after seeing the lover of his dream

spontaneously combust a nut is defined as being serious in a sense
by Yourself34245 December 10, 2022
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When a male, typically going through adolescence, accidentally busts a nut for no reason.
Adam: Did you see what happened to Rick? We were in math and he accidentally cummed in his pants for no reason.
Dan: Shit bro, spontaneous combustion isn't it
by QueenOfRain April 16, 2019
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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
Get the Spontaneous anal combustion mug.