When the volume of shit is so tremendous, your butt experiences labor pains. Men experience no envy about babies, contrary to what some women think, because they poop like norse gods.

Although it happens rarely, it is possible for a woman to become pregnant from anal sex if the semen leaks out of her asshole and into her cunt -- the term for a child born as such is "shitbaby."

-noun
The rare and unfortunate occurrence of a bowel movement that crests the leg openings AND rear band of an infant or toddler's diaper, resulting in yellow, curdy staining of a substantial area of the child and his/her clothing (and often furniture, parents, and household pets).

See also shitback and shitleg