Definition of "thunderation" []

• An exclamation of surprise, agitation or petulance. (interjection)

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• "Some word which sounded very much like "thunderation" escaped his lips, but he said no more, for he saw in the sleeping woman's face a look he never mistook."
• "“And just how in thunderation do you reckon that, when you never even set eyes on her face?” demanded Crockett."
• "Would you care to explain what in thunderation is going on?"