keep cards close to chest

keep/play your cards close to your chest

to not tell anyone what you plan to do I never know what Martin's next move will be. He plays his cards close to his chest.

Name	Pronounced	Usage
Taffy	-	Welsh
Breno	-	Portuguese
Brand	[brænd]
Nefertari	nef-ər-TAHR-ee (English)	Ancient Egyptian
FİKrİ	-	Turkish
Frodo	FRO-do (English)	Literature