breaking my neck
When you absolutely care about someone enough to do anything for them even when they don't want or need your help you broke your neck for them or looking out for them when you know they need someone to care for them
You really going to choose her over me when I was the one breaking my neck for you
Breaking my neck
To be in desperate need of a piss, normally when there isn't a toilet about.
I got on my bike today, and as soon as I pulled out of the driveway I was breaking my neck, but had to wait til I got to work.