U.S. slang. [f. THUNDER sb. + -ATION.] Used as a vague expletive or intensive: cf. THUNDER sb. 4.

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1833.  Elizabeth-City (NC) Star, 18 May, 1/3. Any pray good Mr. Printer, who is this Nelly Fires that’s kicking up such a thundering hul-loo in South Carolina—she must be a rip-roarer, a raal swinge cat, I sorty reckon.—My honey and thunderations!

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1844.  Maj. J. Jones, Lett. to Henry Clay, 9 Aug., in Brooklyn Star (5 Sept.), 2/1. I’d see ’em testatiously quattlebumbed into everlasting thunderation afore I’d vote for ’em, or any of ther frends.

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1856.  ‘Mark Twain’ (Snodgrass) in Saturday Post, 14 Nov., in A. B. Paine, Boy’s Life of Mark Twain (1916), 66. When we got to the depo’, I went around to git a look at the iron hoss. Thunderation! It wasn’t no more like a hoss than a meetin’-house.

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1887.  Century Mag., Nov., 44/2. Everybody wants to know who in thunderation Rache will marry.

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1901.  Munsey’s Mag., XXIV. 792/2. ‘I like you all to thunderation…,’ he said earnestly, dropping all reserve, ‘but [etc.].’

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