From Longman Dictionary of Contemporary Englishbombshellbomb‧shell /ˈbɒmʃel $ ˈbɑːm-/ noun [countable]1SHOCKan unexpected and very shocking piece of news
Then came the bombshell: the factory was to close down.
Finally, she dropped the bombshell. She was pregnant, she said.2 →blonde bombshellExamples from the Corpusbombshell• For the board of directors, the news of the crash came as a bombshell.• But while they were there Farash dropped a bombshell.• Her three-page typed reply, when it was finally received, dropped like a bombshell.• The word had fallen like a bombshell in the pure and tranquilatmosphere of the Archer dining-room.• A bit of a bombshell, Vi distracts Betty's hard-wonsuitor Hugh, touching off a set of siblingsparring.• For the Community Board this was a bombshell.• A bombshell, the announcement drew cries of anguish from critics and fans.• They were successful in the first aim by concentrating on Mr Smith's shadowbudget and re-exploding the taxbombshell.• Then Vanessa dropped the bombshell that she was leaving - and leaving that night.• Meanwhile, rehearsals for BlitheSpirit were proceeding to their second week with me sitting on this bombshell.dropped the bombshell• The company dropped the bombshell as it plunged £711million into the red in the first half of the year.