poker face

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

cara de póquer, rostro inexpresivo

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

:
Despite the bad news, she maintained a perfect poker face.
A pesar de las malas noticias, mantuvo una perfecta cara de póquer.
He tried to keep a poker face during the negotiation, but I could see his excitement.
Intentó mantener una cara de póquer durante la negociación, pero pude ver su emoción.