English

Definition of poker face noun from the Oxford Advanced Learner's Dictionary

 

poker face

 noun
noun
BrE BrE//ˈpəʊkə feɪs//
 
; NAmE NAmE//ˈpoʊkər feɪs//
 
(informal)
 
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an expression on your face that does not show what you are thinking or feeling He maintained a poker face.