thunderbolt

(thŭnˈdər-bōltˌ)

1. A discharge of lightning accompanied by thunder.
2. A flash of lightning conceived as a bolt or dart hurled from the heavens.
3. a. One that acts with sudden and destructive fury.
   b. A startling, forceful action: “Every political campaign manager saves a thunderbolt for the last week before Election Day” (Art Buchwald).