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
Micah	MIE-kə (English)	Biblical, English
Yahweh	YAH-way	Theology
Adalbern	-	Ancient Germanic
Oddr	-	Ancient Scandinavian
Hiltrud	HIL-troot	German
Wall	[wɔ:l]