When a particular actor/musician/performer pollutes a project with celebrity cameos to the point where it overshadows the work itself. This is done out of a true desire to collaborate or more commonly as a shameless cash-in to draw a bigger audience.
Guy 1: Did you see that new Beastie Boys video? Has Will Ferrel, Jack Black, Seth Rogan and a ton of others.
Guy 2: Yeah it was pretty good but holy cow what a cameo cash-in! And I thought Pauly Shore Is Dead was a big cameo cash-in...
Guy 1: You're right. They could have done it without them to the same effect.