duffer

/D AH1 F ER0/
adjective
  1. 1

    Worthless; not working properly, defective.

    โ€œWhy do I always get a shopping trolley with duff wheels?โ€

Synonyms

noun
  1. 1

    An incompetent or clumsy person.

  2. 2

    A player having little skill, especially a golfer who duffs.

  3. 3

    A pedlar or hawker, especially one selling cheap or substandard goods.

  4. 4

    Cheap or substandard goods sold by a duffer.

  5. 5

    A cow that does not produce milk.

  6. 6

    A cattle thief or thief of other livestock; one who alters the brands of cattle.

  7. 7

    A racing pigeon that does not perform well.

  8. 8

    Any of various nymphalid butterflies of the genus Discophora.

Source: https://en.wiktionary.org/wiki/duff, https://en.wiktionary.org/wiki/duffer