Why do we say 'poker face' and other popular expressions

Lady Gaga's Song Poker Face Isn't About Playing Cards what does poker face mean A “poker face” refers to a facial expression that doesn't reveal any emotion, especially in situations like playing poker where it's essential not to show any what are the best poker hands A face on a person that shows no emotion, often called poker face because in the game of poker it would be foolish to show any emotional traits that might

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