Dooms‧day /ˈduːmzdeɪ/
noun [uncountable]1. till/until Doomsday informal for a very long time:
You could wait till Doomsday and he’d never show up.2. the last day of the Earth’s existence, when everything will be destroyed, according to some religions
doomsday scenario (=a description of a very bad and hopeless situation) [TahlilGaran] Dictionary of Contemporary English ▲