Ballpit Rock is fun, ridiculous rock music forcing audiences and musicians to take pride in what makes them individuals, take the piss out of everything, and celebrate what makes them happy. The Ballpit is a tightknit and loving community, but members are encouraged to embrace their personal wild sides. At live shows, pitters let go of all their inhibitions and unite in a mess of screaming and jumping.
Person 1: Hey dude, I'm really nervous about voicing my opinions and being myself. Got any advice?
Person 2: Bro, you gotta live this ballpit rock lifestyle. Comemosh with me tonight and I'll introduce you to the other pitters. Trust me, you won't regret it.
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.