"Lean over backwards" is an expression that means to go above and beyond what is required or expected to accomplish a task or fulfill an obligation. Some synonyms for this phrase include: bend over backwards, do one's utmost, go the extra mile, spare no effort, put oneself out, make a special effort, make every effort, give it one's all, strain every nerve, and pull out all the stops. These phrases illustrate determination, hard work and dedication to a task or commitment, reflecting a strong desire to succeed and meet expectations. Whichever expression one chooses, it underscores one's willingness to work hard to achieve a desired goal.