Definition of bite one's lip in English:

bite one's lip

phrase

  • Repress an emotion; stifle laughter or repress a retort:

    ‘she bit her lip to stop the rush of bitter words’
    • ‘I bit my lip and forced myself to be calm.’
    • ‘She bit her lip; suddenly realizing she'd used the term "amazing" a lot since arriving in London.’
    • ‘The girl beside him had bitten her lip to keep from crying out loud.’
    • ‘Ashley felt the beginning of a smile, and she bit her lip.’
    • ‘The brunette winced, knowing that Mack had no idea how many times Charlie had bitten his lip to stop the questions that sprung up in his mind.’