What is the origin of the idiom "bucket list" and when to use it?

The origin of the phrase "bucket list" is uncertain, but it is thought to have originated in the United States in the mid-20th century. It may have been inspired by the phrase "kick the bucket," which is a euphemism for dying. It refers to a list of things that someone wants to do or achieve before they die. It typically includes activities or experiences that are considered significant or meaningful, and that the person may not have had the opportunity to pursue yet.