Here are some examples:
* "I'm going to finish this project, come hell or high water."
* "She promised to be there for her friend, come hell or high water."
* "We will get this job done, come hell or high water."
The idiom emphasizes that the speaker will not be deterred by anything, even if it means facing extreme hardship or adversity. It highlights the strength of their commitment and their willingness to overcome any obstacles.