Bend over backward - backwards

Bend over backwards (backward)

Meaning:

Do as much as you can to help or please someone.

If you bend over backwards, you do your best or try harder than you need in order to please someone or do something he/she wants.

Example:

The manager bent overbackwards to help new employees.

I bent over backward, trying to defend her. I don't know what else I can do for her.