rump

The fleshy hindquarters of an animal.

A cut of beef or veal from the rump.

The buttocks.

The part of a bird’s back nearest the tail.

The last or inferior part.

A legislature having only a small part of its original membership and therefore being unrepresentative or lacking in authority.

To turn one’s back upon.

The tail-end of an animal; the hinder parts; the backside or buttocks; technically, the gluteal or uropygial region; the uropygium. See sacrum and uropygium.

Figuratively. the fag-end of a thing.

The end of the backbone of an animal, with the parts adjacent; the buttock or buttocks.