straight face

慣用表現

(idiomatic) A face that is expressionless, especially not laughing.

日本語の意味

表情がなく、笑顔を見せない顔、無表情な顔

Despite the comedian's jokes, she kept a straight face.

コメディアンのジョークにもかかわらず、彼女は真顔を崩さなかった。

意味（1）

(idiomatic) A face that is expressionless, especially not laughing.

I don't think I could recite Peter Piper quickly ten times with a straight face.

straight faces

（ plural ）