Idiom:  keep a straight face


Idiom:  keep a straight face

  • to keep one's face expressionless and not smile, laugh, etc.

Example sentences

  • When the speaker kept criticizing my professor it was hard for us to keep a straight face.
  • I had to keep a straight face while my six year-old sister told me about breaking up with her "boyfriend" but I laughed about it with our mom afterwards. 
  • It's hard to keep a straight face when you're yelling like a crazy person.
  • I kept a straight face but I was furious when my mother-in-law told everyone my son doesn't like my cooking.
  • My family tried to keep a straight face when my little sister came out wearing my mom's lingerie.
  • We tried but no one could keep a straight face when the Prime Minister farted loudly.
  • How can you keep a straight face when customers lie so blatantly?
  • No one could keep straight face when our boss took credit for our idea for the fundraiser.


  • poker face

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