Duff /(dŭf)/

1. Dough or paste. [Prov. Eng.]
2. A stiff flour pudding, boiled in a bag; -- a term used especially by seamen; as, plum duff.

1. the buttocks; as, get off your duff and get to work. [slang]

imp. & p. p. Duffed; p. pr. & vb. n. Duffing

1. To treat or manipulate so as to give a specious appearance to; to fake; hence, to cheat. [Colloq. or Slang]
2. In Australia, to alter the brands on (cattle, horses, etc.); to steal (cattle, etc.), and alter their brands.