Wiktionary
thunderation
interj. (context US colloquial English) An exclamation of surprise, agitation or petulance.
Wikipedia
Thunderation
Thunderation is an outdoor steel roller coaster at Silver Dollar City in Branson, Missouri. It was developed by Arrow Dynamics and manufactured by Intermountain Lift, Inc. It opened in 1993. The third and fifth cars of the roller coaster used to point backwards. This has since been changed.