one-hit wonder

noun4

1. •
   A recording artist known for only one hit song, especially after failing at subsequent attempts at success.
2. •
   A person or group known for achieving only a single major accomplishment.

   • The European company is no one-hit wonder. The company has another best seller in its J-class car, sold as a Vauxhall Cavalier. — 1990
3. •
   The hit song itself, rather than the musical artist.
4. •
   (slang) An instance of achieving a high from the first hit.