break your neck to do something

break (one's) neck

To put forth a great deal of effort. I've been breaking my neck trying to get a passing grade this semester, so failing by two measly points is incredibly frustrating. Don't break your neck trying to please these people—they'll never appreciate it.
See also: break, neck
Farlex Dictionary of Idioms.

break your neck to do something

exert yourself to the utmost to achieve something. informal
See also: break, neck, something
Farlex Partner Idioms Dictionary
See also:
  • break (one's) neck
  • break neck
  • break one's neck
  • break your neck
  • break your back
  • break your back doing something/to do something
  • break one's back
  • break back
  • break (one's) back
  • break (one's) back to (do something)