オワコン

noun

has-been; past its prime; obsolete

Internet slang abbreviation of 終わったコンテンツ. Used for things (games, trends, celebrities, etc.) that are no longer popular or relevant. Often carries a dismissive or mocking tone.

• あのゲームはもうオワコンだよ。

  That game is already a has-been.

• オワコン扱あつかいされるのが嫌いやで、必ひっ死しに新あたらしい企き画かくを考かんがえている。

  Not wanting to be treated as obsolete, he's desperately thinking up new projects.