Peed in the Ball Pit
The convention equivalent of "Jumped the Shark". Applied only when things at a convention have gotten so ridiculous it's hard to believe that they're really happening. Reference to the wild failure that was the first-ever Tumblr-convention known as "Dashcon" in which one person urinated in the ball-pit, one of the only sources of entertainment.
That new convention was a total failure, somebody really peed in the ball pit on that one.