blow (one's) cover

(redirected from blow his 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 ?
One wrong word could blow his cover and result in a bullet to the head, so the stakes couldn't be higher.
But when his ex wife (Tracy Ann Oberman) arrives to stage a vigil in his memory, David finds it hard not to blow his cover.
Bolton v Reading 8pm MATT MILLS is backing the Bolton 'Messi' to blow his cover and shoot down Reading.
It's time for Andy to come clean, but will Gavin blow his cover first?
Phil can't blow his cover, so he offers to jump out of a plane for their charity.
Charlotte who we met at Colin's retirement party, is aware of John's teaching ban, will she blow his cover or can she keep a secret?
THE officer in charge of the Maze on the day LVF chief Billy Wright was murdered will be forced to blow his cover when the public inquiry into the killer's death gets under way.