break (one's) neck
1. 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. I've been breaking my neck to find a way out of these legal problems, but, as of now, I'm still going to prison.
2. To harm or punish one very severely. Typically used as a warning or a threat. Be careful—the boss will break your neck if he catches you using company property like that. You just watch yourself, pal. If I see you snooping around here again, I'll break your neck! You better not cross that guy, Steve. He'll have his goons break your neck without a second thought!
Farlex Dictionary of Idioms. © 2024 Farlex, Inc, all rights reserved.