blow (one's) cover

(redirected from blew 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.
See also: blow, cover

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.
See also: blow, cover

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.
See also: blow, cover

blow someone's cover

INFORMAL
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.
See also: blow, cover

blow someone's cover

discover or expose someone's real identity.
See also: blow, cover

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.
See also: blow, cover
References in periodicals archive ?
Prior to the announcement of the evictee, Alex and Morgan almost blew their cover when the former called the latter "Mo" during their first night in the "Big Brother" house.
Actor Ashton, 34, and 29-yearold Mila managed to keep their trip a secret until the former Westlife star blew their cover, tweeting: "Having dinner with @aplusk and @mila_kuniss.
However, the pull of punch bags, dumbbells and medicine balls, was too much and the gym-goers blew their cover by turning up at a boxing gym in New Cross, South London.
The Sunday newspaper which blew their cover yesterday - recording no fewer than four New Labour Lords accused of offering to change the law in exchange for fat fees from what they were fooled into thinking were lobbyists - has done the country a service.
It is claimed that local police deliberately blew their cover, even though they knew about their mission.
They, not Pollard, exposed the names of our American agents in the Soviet Union and blew their cover.
BUNGLING raiders posing as a woman and her brother blew their cover with a bad wig and ill-fitting suit, a court heard yesterday.
But RBS staff blew their cover because it was rare for the huge amount of Scottish notes they were seeing to be in circulation overseas.
But hapless Johnny blew their cover - leaning out of the window and smoking like a trouper as fans waved in adulation.