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- play cards close to chest
play cards close to chest
play one's cards close to one's chest
and 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 vestFig. 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.