A religious congregation of peolple who believe in the existence of the longcat. The term might include a slight allusion to the catholic church, although it's not 100% sure if this was the creators intention (it was).
Not to confuse with Pantherinaeism, the believe in the existence of Pantherinae (big cats).
man: "And how is this religion called you're talking about?"
rider: "it's called longcatolicism"
aj: "i thought it was called pantherinaeism ^^"