What does the idiom wore a poker face mean?

What does the idiom wore a poker face mean? poker face def The phrase poker face is often used to describe the expression poker sheet pdf Our Flag Means Death · Outcast · Outlander · Ozark · P-Valley · Pachinko · Painkiller Poker Face Charlie Cale is Columbo for the streaming era WATCH NOW ON

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poker hand reading Someone with a poker face doesn't show any emotion or reaction so that people don't know what they are feeling Country: International English Poker face is a noun that means a facial expression without emotions When someone has a poker face, it means their facial expression is blank and hiding