int. and sb. [f. FIDDLE sb. or v., used in a contemptuous sense with a nonsensical appendage.]

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  A.  int. Nonsense!

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a. 1784.  Johnson, in Boswell’s Life (1848), Appdx. 837/1. All he [Johnson] said was, ‘Fiddle-de-dee, my dear.’

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1825.  J. Neal, Brother Jonathan, I. 182. Fiddle de dee then; I’ll venter it!

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1865.  Trollope, Belton Est., xxix. 352. ‘He is a man very estimable,—of estimable qualities.’ ‘Fiddle-de-dee. He is an ape,—a monkey to be carried on his mother’s organ.’

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  B.  sb. Nonsense, absurdity.

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Mod.  That is all fiddle-de-dee.

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