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.
See also: blow, cover
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

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
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.

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
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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
Collins COBUILD Idioms Dictionary, 3rd ed. © HarperCollins Publishers 2012

blow someone's cover

discover or expose someone's real identity.
See also: blow, cover
Farlex Partner Idioms Dictionary © Farlex 2017

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
Farlex Partner Idioms Dictionary © Farlex 2017

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.
See also: blow, cover
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.
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References in periodicals archive ?
The two work together to solve the mystery and not blow their cover.
A Target staff member told the Gold Coast Bulletin newspaper that they made sure that no one was around to blow their cover.
"They made sure no one was around to blow their cover," the employee, who refused to be named, told news.com.au.
They're supposed to live in the shadows but when the spooks of Sweden decided to blow their cover, they did it spectacularly.
The chances are that every do-gooder thrust into an impoverished community will blow their cover at the first sighting of a camera crew in tow.
Now a four-year-old concept, the chances are that every do-gooder thrust into the crux of an impoverished community, no matter how convincing their guise as one of the 'little people', will blow their cover at the first sighting of a camera crew in tow.
But revelers, including Lorenzo di Bonaventura and Ryan Kavanaugh, kept spirits up, and some guests, like Columbia prexy Matt Tolmach, got loose enough to blow their cover.
Cain fears Latisha will blow their cover as she blows their ill-gotten gains.