play cards close to chest
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Related to play cards close to chest: keep cards close to chest
play (one's) cards close to (one's) chest
To keep one's plans, intentions, or tactics secret from everyone else. Refers to holding one's playing cards close to one's chest in a card game, so as not to allow other players to see one's hand. We're all curious about what the boss has been discussing in those meetings with the lawyers, but she's playing her cards close to her chest. Sorry for not being more straightforward about my plans, but I'm playing my cards close to my chest for the time being.
play one's cards close to one's chestand play one's cards close to one's vest; keep one's cards close to one's chest; keep one's cards close to one's vest
Fig. to keep to oneself or be very cautious in one's dealing with people. (As if one were playing cards and not permitting anyone to see any of the cards.) He is very cautious. He plays his cards close to his chest. You seem to be playing your cards close to your vest.