Any condition wherein chaos spreads from its original circumstances to another, usually unrelated, situation.
Everyone went crazy in line when we all found out that the Playstation 4's were shipped late. We all had to call in sick keep our places, so I'm sure it was Tandemonium at work.
Dude2: I was livin'the rad life the Helm saturday night, and there were hella bros, mexican cowboys, white trash dudes, trannys, punk rockers, and overflow from goathill tavern.