aintcha

contraction

1. (alt-of, alternative, contraction)Alternative form of ain'tcha.

noun

1. (slang)perineum

   “Fingal counted eleven tick bites - that he could see. A few more could be felt: one on his left arse cheek, for example, one on his scalp, and two in the perineum, or the gouch, the area of skin between a human's anus and scrotum (some Australians, he'd learned, also referred to the gouch as the as the aintcha, as in "well it aintcha balls, or your arse") Binjari ticks loved the gouch.”