Body Parts Series
Taint is a term used to refer to the perineum (the region of the human body between the genitalia and the anus). This term has no basis in medical terminology and is most often considered lewd and obscene. Taint is specific to males and females.
It's called a taint because t'aint your balls and t'aint your ass.
Originated when medical professionals were trying to find a suitable alternative to the term perineum. "Well, t'ain't part of the penis and t'aint part of the asshole..."
There are various other slang terms associated with this region of the human body. These include "guiche," "geesh," "gooch," "chode," "swabble," "bonch," "nifkin," "runway," "fleshy fun-bridge," "million dollar pressure point," "durf," and "grundle."and in Britain its known as the "barse" as its between the bollocks and the arse.