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duffing

duffing, ppl. a. slang.
  (ˈdʌfɪŋ)
  [f. duff v.1]
  1. That passes off a worthless article as valuable.

1862 Lond. Herald 27 Dec. (Farmer) Houses..run up by the ‘duffing’ builder, merely for sale.

  2. Counterfeit, rubbishy and offered as valuable.

1851 Mayhew Lond. Labour (1861) II. 19 Dealers in ‘duffing fiddles’. These are German-made instruments, and are sold to the Street-folk at 2s. 6d. or 3s. each. 1873 Times Jan. (Farmer) We know now that so-called ‘duffing’ jewellery is scattered far and wide. 1883 Sword & Trowel July 355 ‘Duffing’ canaries, or painted sparrows.

  3. Incompetent, inept, stupid, duffer-like.

1881 J. Grant Cameronians I. iii. 39 A little brilliant singing, which Hew..secretly stigmatised as ‘the most duffing caterwauling!’

Oxford English Dictionary

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