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
Asher	A-shər (English)	Hebrew, English, Biblical, Biblical Hebrew
Jayson	JAY-sən	English
Gertraud	GER-trowt	German
Lucretia	-	Ancient Roman, Roman Mythology
Erlingr	-	Ancient Scandinavian
Oluwaseyi	-	Western African, Yoruba