blow (one's) cover(redirected from blow their cover)
blow (one's) cover
To expose one's true identity or motives after they had been intentionally concealed (i.e. after one had been "undercover"). The spy fled when he realized that someone had blown his cover. I totally blew my cover when I stupidly wore my school jacket to steal the other team's mascot.
blow someone's cover
Sl. to reveal someone's true identity; to ruin someone's scheme for concealment. The dog recognized me and blew my cover. I didn't mean to blow your cover by calling out to you.
blow one's cover
Inadvertently give away one's secret identity, as in Mary came to the annual meeting pretending to be a shareholder and hoped no one would blow her cover . This expression uses blow in the sense of "expose or betray," a usage dating from Shakespeare's day.
blow someone's coverINFORMAL
If you blow someone's cover you tell other people who they are or what they are doing, when they are trying to keep it secret. Asking those kind of questions could blow my cover. The young man looked embarrassed, as if he were a spy whose cover had been blown.
blow someone's coverdiscover or expose someone's real identity.
blow somebody’s ˈcover(informal) discover or reveal the real identity of somebody, especially of a spy, etc: She had been posing as a diplomat, but her cover was blown when she was found sending coded messages to agents.
blow someone’s cover
tv. to reveal someone’s true identity; to ruin someone’s scheme for concealment. The dog recognized me and blew my cover.