A bucket list contains all the things you wish to do before you die.
It comes from the phrase to kick the bucket, which means dying. It is believed to refer to hanging when people stand on a bucket before their final moment, when the bucket is kicked.
On that website, https://bucketlist.org I’ve found some pretty surprising ideas such as : go to all the Harry Potter locations, rope swing into water, build a gingerbread house, send a message in a bottle, or visit a tree house.
Here is a youtube video of a Charlie Winston song Kick the Bucket, with lyrics. Enjoy!