Definition of break one's neck to do something in English:

break one's neck to do something

phrase

informal
  • Exert oneself to the utmost to achieve something.

    ‘he had to break his neck to make Price's work look good’
    • ‘You do not seem to enjoy being in their company, even though Natasha breaks her neck to make you comfortable.’
    • ‘I'm afraid I've lost a bit of respect for the people I've been breaking my neck to represent.’
    • ‘But tonight showed the contrast between a guy who's finished his agenda and a guy who's breaking his neck to implement a new agenda.’
    • ‘I support this, although I wouldn't break my neck to fight for it.’
    • ‘I am beginning to feel out of step because I'm not breaking my neck to grow my business.’