A.k.a. chad or perineum. The region between genitals and arsehole.

Taint gets its name from the sentence: It ain't pussy, it ain't arse.

i.e. 'taint pussy, 'taint arse.

when you're hungover as shit after a spending a night drunk as a skunk

That space between your balls and your asshole

the skin inbetween the anus and the balls or vagina

a slang used to refer to the perineum, the part of the body between the anus and genital organs, overlying the pubococcygeal muscle. This term supposedly originates from the fact that, "'Tain't your balls, and 'tain't your ass," "'tain't" being a contraction of "it" and "ain't", in this case, meaning "it is not."

The region of skin between the genitals and the anus; often accompanied by dingleberries.