noun Slang.

  1. the buttocks or rump: If you don’t like the way things are, get off your duff and do something about it!


  1. a stiff flour pudding, boiled or steamed and often flavored with currants, citron, and spices.

verb (used with object) Slang.

  1. to give a deliberately deceptive appearance to; misrepresent; fake.
  2. British. (in golf) to misplay (a golf ball), especially to misjudge one’s swing so that the club strikes the ground behind the ball before hitting it.
  3. Australian.
    1. to steal (cattle).
    2. (formerly) to alter the brand on (stolen cattle).
  4. to cheat someone.


  1. organic matter in various stages of decomposition on the floor of the forest.
  2. fine, dry coal, especially anthracite.


  1. a thick flour pudding, often flavoured with currants, citron, etc, and boiled in a cloth bagplum duff
  2. up the duff slang pregnant

verb (tr)

  1. slang to change the appearance of or give a false appearance to (old or stolen goods); fake
  2. Australian slang to steal (cattle), altering the brand
  3. Also: sclaff golf informal to bungle (a shot) by hitting the ground behind the ball


  1. British informal bad or useless, as by not working out or operating correctly; duda duff idea; a duff engine


  1. slang the rump or buttocks

“buttocks, rump,” 1830s, of unknown origin.

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