(kuf) noun
1. A band about the wrist.
2. The lower part of a sleeve.
3. The portion of a long glove or gauntlet covering the wrist.
4. The turned-up hem on a trouser leg.
5. A handcuff.
—on the cuff U.S. Slang On credit; with payment postponed. [ME cuffe, coffe; origin unknown]

(kuf) v.t.
To strike, as with the open hand; buffet.
—v.i. To scuffle or fight; box.
—noun A blow, especially with the open hand. [? <Scand. Cf. Sw. kuffa push.]