duff

Concise Oxford English Dictionary © 2008 Oxford University Press:
duff1

▶noun a flour pudding boiled or steamed in a cloth bag.

– origin C19: northern English form of dough.

Concise Oxford English Dictionary © 2008 Oxford University Press:
duff2

▶adjective Brit. informal worthless or false. ▶noun N. Amer. & Scottish decaying vegetable matter covering the ground under trees.

– origin C18: of unknown origin.

Concise Oxford English Dictionary © 2008 Oxford University Press:
duff3

▶verb informal

• 1 (duff someone up) Brit. beat someone up.

• 2 Austral. steal and alter brands on (cattle).

• 3 Golf mishit (a shot).

– origin sense 1 (1960s) of uncertain origin; senses 2 and 3 (both C19) prob. back-forms from duffer2 and duffer1 respectively.

Concise Oxford English Dictionary © 2008 Oxford University Press:
duff4

▶noun N. Amer. informal a person's buttocks.

– origin C19: of unknown origin.

Concise Oxford English Dictionary © 2008 Oxford University Press:
duff5

▶noun (in phr. up the duff) Brit. informal pregnant.

– origin 1940s (orig. Austral.): perh. rel. to duff1.