a gigantic ass explosion (which see). Not just explosive but NUCLEAR. Chars the ass releasing it, resulting in painful dumps for days following. Usually the result of alcohol and some type of spicy food. The fumes blind anyone within the confines of the restroom.
A unique phenomena among would be suicide bombers where their explosives detonate prematurely.
Palestinians sometimes refer to this as a "work accident".
When squeezing a spot and all the hall marks of it popping are there, i.e pain and a crunching sensation/noise, but any puss or fluids havent been ejected from the body but have burst under the skin and are still internal.
Cock and ball detonation (CBD) is a sexual activity involving application of explosives to the male genitals. This may involve directly applying plastic explosives, dynamite in the butt or taped to the shaft, black cats in the urethra, application of blast tape to the balls, incendiary rounds, IDEs, flash powder, PENT, cherry bombs attached to the balls, or putting your penis in tannerite.