bite your lip
to prevent yourself from showing your reaction to something by speaking or laughing:
I really wanted to laugh - I had to bite my lip.
Thesaurus: synonyms and related words
Not showing or feeling emotions
- anodyne
- belie
- bite
- clinically
- cold-eyed
- detachment
- evenly
- expressionless
- glaze
- hard-bitten
- icy
- immune
- impassive
- po-faced
- poker-faced
- reserved
- sphinx-like
- stiff upper lip
- stoic
- stoicism
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