Definitions from Wiktionary ( )

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

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