Examples:

• Break your back working all day.
• It won't break your back but it's work and no mistake.
• Go on. Say it before I break your back.
• The turbulence could break your back.
• A 2 by 5 like this will not break your back.
• You're gonna break your neck, you're gonna break your back, okay?
• It's better to use your head than break your back, I always say.
• If you stand like that, you might break your back!
• Well don't break your back, you know, enjoy your vacation.
• Yeah, don't break your back lugging that trunk Full of war paint.