noun dough or paste.
2. duff ·noun a stiff flour pudding, boiled in a bag;
a term used especially by seamen; as, plum duff.
3. duff ·add. ·vt in australia, to alter the brands on (cattle, horses, ·etc.); to steal (cattle, ·etc.), and alter their brands.
4. duff ·add. ·vt to treat or manipulate so as to give a specious appearance to; to fake; hence, to cheat.