breast one's cards verb3 •To hold one's cards close to the chest.Flynt shifted in his chair, breasting his cards, then glared at Sunny. "You'll have to wait till I play this hand. — 1995 •To avoid revealing information.A firm believer in breasting his cards, Jenks was keeping the "Pulitzer" file under wraps a while longer. — 1996 •Alternative form of chest one's cards. formsbreasted one's cards · breasting one's cards · breasts one's cards