Duff (duf), n. [From OE. dagh. √67. See [Dough].]

1.

Dough or paste. [Prov. Eng.] Halliwell.

2.

A stiff flour pudding, boiled in a bag; -- a term used especially by seamen; as, plum duff.

© [Webster 1913]

Duff (?), v. t. [imp. & p. p. [Duffed]; p. pr. & vb. n. [Duffing].] [Etym. uncertain.] [Colloq. or Slang]

1.

To treat or manipulate so as to give a specious appearance to; to fake; hence, to cheat.

2.

In Australia, to alter the brands on (cattle, horses, etc.); to steal (cattle, etc.), and alter their brands.

© [Webster 1913]

Duff (definition)