Meanings
Because playing cards kept close to one's chest are difficult to see for an opposing player.
How to pronounce "keep one's cards close to one's chest":
AU
To avoid revealing one's thoughts, circumstances, or plans.
Because playing cards kept close to one's chest are difficult to see for an opposing player.
How to pronounce "keep one's cards close to one's chest":
To avoid revealing one's thoughts, circumstances, or plans.