the.com/bombshell

means A shocking piece of news or a strikingly attractive person that hits with sudden, dramatic force.

from Literally a shell packed with explosives, from 'bomb' (ultimately from Greek 'bombos,' a booming sound) plus 'shell.' The figurative sense of 'stunning news' emerged in the early 20th century, drawing on the image of an actual explosive dropping into calm surroundings. The glamorous-woman sense ('blonde bombshell') arrived around the same era, likening a devastatingly attractive person to something that detonates on impact — leaving the room, metaphorically, in rubble.