a hole card

(American)

a secret advantage that is ready to use when you need it She still had one hole card to get out of police custody - a phone call to an influential friend.

Common Names:

Name	Pronounced	Usage
Zia	-	Arabic
Sam	[sæm]
Havel	-	Czech, Slovak
Endzela	-	Georgian
Hollis	['hɔlis]
Alison	AL-i-sən (English), a-lee-SAWN (French)	English, French