adjective
comparative form of duff: more duff
noun
(informal) An incompetent, indolent, or clumsy person.
(sports) A player having little skill, especially a golfer who duffs.
(archaic) A pedlar or hawker, especially one selling cheap or substandard goods.
(archaic) Cheap or substandard goods sold by a duffer.
(archaic) Anything substandard, such as a counterfeit or a defective instance.
(dated) A cow that does not produce milk or produces substantially less than her peers do.
(Australia, dated) A cattle thief or thief of other livestock; one who alters the brands of cattle.
A racing pigeon that does not perform well.
(entomology) Any of various nymphalid butterflies of the genus Discophora.