noun. The event that started Battlestar Galactica: A mass murder caused by shiny, toaster-like, evil robots.
Real citation: "Granted, escapecar, as you and many others have already stated it would have led to some painful follow-up questions, but where is my Papadama willing to take responsibility? That would have been a great opportunity to give Adama something real to be angsty and torn instead of putting the blame about the cyloncaust on his shoulders alone."
(Reraizure, "3-19: "Crossroads, Part I" 2007.03.18," March 20, 2007, Television Without Pity, http://forums.televisionwithoutpity.com/index.php?s=&showtopic=3152259&view=findpost&p=7438053)
Made-up citation: "The Cyloncaust was a bummer, but Tricia Helfer, Lucy Lawless, and Grace Park can Cyloncaust me anytime."