D defs.my
Entry 3 senses Webster, 1913

Rump

/rŭmp/ · IPA /ˈɹʌmp/
01 n. The end of the backbone of an animal, with the parts adjacent; the buttock or buttocks.
  1. 1.
    The end of the backbone of an animal, with the parts adjacent; the buttock or buttocks.
  2. 2.
    Among butchers, the piece of beef between the sirloin and the aitchbone piece. See Illust. of Beef. See: Beef
  3. 3.
    The hind or tail end; a fag-end; a remnant.Fig.:
    “The Rump abolished the House of Lords, the army abolished the Rump, and by this army of saints Cromwell governed.” Swift.