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.

Common Names:

Name	Pronounced	Usage
Penny	['peni]
Vikentiy	-	Russian
Nur Ad-Din	-	Arabic
Melek (1)	-	Hebrew
Chantal	shawn-TAHL (French), shawn-TAL (English), shan-TAL (English), shahn-TAHL (Dutch)	French, English, Dutch
Dafna	-	Hebrew