dig your heels in।।

✍🏻Meaning:- If you dig your heels in, you stubbornly resist something or refuse to change.

For example:- 

👉🏻Even though the developer offered them more than their houses were worth, the owners dug their heels in and refused to sell up and make way for the office block.

👉🏻When their record company told the band to change their style and make more commercial music, the band dug their heels in and refused to change.

✍🏻Origin:- Probably related to the fact that if a person or an animal resists being pulled forward, the body will lean backwards and the heels will dig into the ground as the legs resist the forward motion.