the.com/haunch

means The fleshy hindquarter of a human or animal body, spanning hip, buttock, and thigh.

from From Old French 'hanche,' which likely traces back to a Germanic root related to the idea of bending or the joint of the leg — the same deep family that gave English words tied to crooked or hinged shapes. It came into English in the medieval period via Anglo-Norman, originally describing the hip joint in both people and animals before settling into its meaty, haunch-of-venison sense.