duff 1
/duf/ , n. Slang.
the buttocks or rump: If you don't like the way things are, get off your duff and do something about it!
[ 1885-90; expressive word, perh. akin to DOUP ]
duff 2
/duf/ , n.
a stiff flour pudding, boiled or steamed and often flavored with currants, citron, and spices.
[ 1830-40; dial. var. (Scots, N England) of DOUGH ]
duff 3
/duf/ , v.t. Slang.
1. to give a deliberately deceptive appearance to; misrepresent; fake.
2. Brit. (in golf) to misplay (a golf ball), esp. to misjudge one's swing so that the club strikes the ground behind the ball before hitting it.
3. Australian.
a. to steal (cattle).
b. (formerly) to alter the brand on (stolen cattle).
4. to cheat someone.
[ 1830-40; back formation from DUFFER (def. 3) ]
duff 4
/duf/ , n.
1. organic matter in various stages of decomposition on the floor of the forest.
2. fine, dry coal, esp. anthracite.
[ 1835-45; orig. Scots dial.; perh. metaphorical use of DUFF 2 , by assoc. with Scots dowf decayed, rotten (see DOWF), deaf (of soil) unproductive, springy to the tread ]