When something defies logic in such a way that cannot be explained. Often used in place of "Nobody ever said it had to make sense."
Friend 1: Hey, can you explain what happened in Fringe last night? It was so confusing!
Friend 2: Batman Beyond, dude.
Friend: Spiderman could never really beat the Firelord!
Friend 2: I know, man. Calm down. Batman Beyond.
Origin: An episode of Batman Beyond where a laser hit a concrete wall which then exploded for no reason.