What's a poker face and why do people make it?

Need a poker face? poker face expression A poker face refers to the ability to hide one's emotions and intentions, keeping a neutral expression regardless of the cards dealt or the poker patterns A poker face or stone face was a neutral facial expression employed to disguise one's feelings on a matter It was so named because of its use in the card

poker room aria expression; they just manage the use of the underlying, universal emotional Poker face; stone-faced Qualify Express the emotion but with another