An
actor/actress who was popular for a brief period of time but
stooped staring in major works.
They are essestially the opposite of an "
A-list actor" which is somebody at the hight of their popularity in Hollywood
Person 1- Hey look it's
Matthew Perry!
Person 2- Who the hell is he?
Person 1- He was the guy that played
Chandler on "Friends"
Person 2-
Oh right
Person 1- He's kind of a B-list actor now.