Washed up is something that appears on the shore of a sea or other body of water, brought there by the waves.(verb)
An example of washed up is when the pieces of a broken ship that was lost at sea start to appear on the sandy beach.
The definition of washed up is someone or something whose time has come and gone; someone who was popular or who had a good career but who now doesn't and has little to offer.(adjective)
An example of a washed up singer is someone whose last album was ten years ago and who now just sits around and mopes.
See washed-up in Webster's New World College Dictionary
See washed-up in American Heritage Dictionary 4
Learn more about washed-up