Cliff Clavin 

asshole who gives useless information, originated from the sitcom Cheers.

That fucktard just pull a Cliff Clavin. He gave me some useless shit.

Cliff Clavin by Anonymous February 18, 2003

Cliff Clavin

A person who thinks they something about everything.

Andy Dauer is a real Cliff Clavin. He would talk to a box of rocks just to show how much he thinks he knows.

Cliff Clavin by Markie Markie April 3, 2026