a straight face
成語所屬單字face
a straight face — 慣用語
1. A serious expression without smiling or laughing, especially when something is f
1.慣用語
釋義
繃著臉；忍住不笑
A serious expression without smiling or laughing, especially when something is funny.
例句
He told the joke with a straight face, but we all laughed.
Can you keep a straight face while I tell you this story?