blow one's 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 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.

词组	blow one's cover
释义	blow one's 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. 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. See also: blow (one's) cover blow cover blow somebody's cover blow someone’s cover blow someone's cover snipe at snipe at (someone or something) throw a game certain party a dead weight
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