break one's back (verb)

1. She broke her back to plan the most romantic surprise date for her partner on their anniversary.

2. In the animated movie, the hardworking protagonist broke his back to earn enough money to save his cartoon world.

3. The superheroes in the comic series often break their back to protect the innocent and fight against evil.

4. The designer broke her back to create a stunning collection for the fashion show that received rave reviews.