1) Religious fervor of a silly variety, usually a reference to prayers to non-existent or otherwise illogical deities. However, can refer to the overly enthusiastic silliness of any group, and is not purely limited to religion.
2) Exclamation, used to defend something otherwise indefensible by logic.
"I can't be like your people, just going all "hububula!" and make magic fall down from the sky!"
What is with all the hububula over iPads and tablets these days?
"Light recoil? Light has no mass! That doesn't even make sense!"
"Hububula!"
"just when you thoughtyou knew it all those damn neggers think up some new hublub and shit and you have no fucking idea what the fuckk is going on anymore"