have an ace up one’s sleeve

tv. to have something useful in reserve; to have a special trick available. (Have got can replace have.) I still have an ace up my sleeve that you don’t know about.

Common Names:

Name	Pronounced	Usage
Eduard	E-doo-ahrt (German)	German, Russian, Czech, Slovak, Croatian, Catalan, Dutch, Estonian, Romanian, Georgian, Armenian
Kaapro	KAH:P-ro	Finnish
North	[nɔ:θ]
Cherokee	CHER-ə-kee	English (Rare)
Bernadette	[.bə:nə'det]
TÓNi	-	Hungarian