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.
by b007y514y3r December 5, 2015
When a women shuves a buttery dildo into her anus, she contracts her but muscles so the the butter oozes out. This is tipicly stereotyped to fat or obese women. An extention of this is when the used butter is used on toast
by Imakeupstuff August 6, 2012
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”
Peng: “ yes, is there something wrong with that?”
Liam and mai: “yes that’s fucking gay”
by Kim Hong Kong September 8, 2019
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”
Peng: “ yes, is there something wrong with that?”
Liam and mai: “yes that’s fucking gay”
by Kim Hong Kong September 8, 2019