Other forms: crotches
The crotch is the place where the legs join the body. The crotch of the trousers, split at the crotch, crotch height.
It is also a tailoring term for the seam there, and in a tree it means the fork where a branch leaves the trunk. The word is a variant of crutch, which shares the idea of a forked shape. It is plain rather than rude but not formal.
1nouncrotchThe place where the legs join the body.
“His new jeans were too tight in the crotch, so he took them back.”
crotch is a body part, or a fork.
Also accepted in games: groin
Of disputed origin, probably a variant of crutch, from Old English crycc, sharing the sense of a forked shape.
Of disputed origin; two possibilities seem likely:
Etymology from Wiktionary, CC BY-SA