to maintain a straight face
- idiom
- Informal
- He tried to maintain a straight face when his friend told a ridiculous story.
Examples
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Despite the chaos in the room, the teacher managed to maintain a straight face.
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During the serious meeting, she struggled to maintain a straight face while her colleague told a funny story.
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She struggled to maintain a straight face during the serious meeting after hearing the joke.
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She tried to maintain a straight face during the serious meeting.
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Can you maintain a straight face while telling a joke?
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Despite the ridiculous situation, he managed to maintain a straight face and not burst into laughter.
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At the funeral, it was hard for him to maintain a straight face when someone made a light-hearted comment.
Antonyms
How Expressive
Surface Forms
Morphology
maintain + a + straight + face
The verb 'maintain' (keep) plus the noun phrase 'straight face' yields a meaning that is largely inferable as 'keep a serious/unsmiling expression', but 'straight' is being used metaphorically rather than in its primary spatial sense. A B1 learner who knows the words will often guess the general meaning, yet the conventional metaphorical use of 'straight' for 'serious' makes the relation only partially transparent rather than fully compositional. Cross-linguistic parallels (e.g. 'mantener la cara seria', 'garder un visage sérieux') increase inferability but do not eliminate the idiomatic nuance.
Etymology
Maintain a straight face comes from the image of holding your face 'straight' and still, with no smile or movement. Like a poker player who hides their feelings, this is why it means 'to keep a serious expression' even when you want to laugh.