Has-been (noun)

Someone who was once successful or famous but is now no longer relevant or important.

Origin:

It is a term used to describe someone who was once successful or famous but is now no longer relevant or important.

Examples:

1. He's a has-been, no one takes him seriously anymore.
2. She was a famous actress, but now she's just a has-been.
3. The company was once successful, but it has become a has-been in the market.
4. He used to be a star athlete, but now he's just a has-been.
5. The band was a has-been by the time they released their last album.