Definition of not on your life in English:

not on your life

phrase

informal
  • Said to emphasize one's refusal to comply with a request.

    ‘‘I want to see Clare alone.’ ‘Not on your life,’ said Buzz’
    • ‘Mac smiled: ‘Speaking for myself, I'd say ‘not on your life.’’
    • ‘M. thinks it's awful and wanted to get in here and paint everything white and put down carpet and I told her not on your life, this room is mine.’
    • ‘It will continue to happen but as for just a stunt, not on your life Robyn.’