- thunderation⇄interj. an exclamation of surprise or annoyance.
Ex. ""Thunderation!"" he muttered indignantly (Time). - thunderation⇄noun the deuce; the devil.
Ex. Everybody wants to know who in thunderation Rache will marry (Century Magazine). - thunderation⇄thunderation, noun, interjection.
(U.S. Dialect or Informal.)