have a card up sleeve

have a card up your sleeve

to have an advantage that other people do not know about I still had a card up my sleeve in the form of a letter from his father.

Name	Pronounced	Usage
Babirye	-	Eastern African, Ganda
Bayram	-	Turkish
Taliesin	tal-ee-ES-in (Welsh)	Welsh, Arthurian Romance
SÍLvia	-	Portuguese, Catalan
Divina	-	English (Rare)
Trijntje	TRIEN-tyə	Dutch