| Idiom | Keep a Straight Face |
|---|---|
| Example | When you see Ms. Navarro's new haircut, try to keep a straight face. |
| Meaning | to keep from laughing |
| Origin | This is a recent idiom. When you laugh, your face wrinkles, your mouth opens wide, your eyebrows rise, and your facial muscles twist and turn. Your face is anything but "straight." |
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