break (one's) back to (do something)(redirected from breaking his back to)
break (one's) back to (do something)
To put forth a great deal of effort to do or accomplish something. I've been breaking my back to get a passing grade this semester, so failing by two measly points is incredibly frustrating. Don't break your back to please these people—they'll never appreciate it.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.