poker face

US /ˈpoʊkər feɪs/
UK /ˈpoʊkər feɪs/
"poker face" picture
1.

visage impassible, visage de poker

an impassive expression that hides one's true feelings or intentions

:
Despite the bad news, she maintained a perfect poker face.
Malgré les mauvaises nouvelles, elle a gardé un parfait visage impassible.
He tried to keep a poker face during the negotiation, but I could see his excitement.
Il a essayé de garder un visage impassible pendant la négociation, mais je pouvais voir son excitation.