presbylutheranism
full name: the western branch of American reform Presbylutheranism. The protestant denomination which the Simpsons as well as most other Springfieldianites belong to. The term is employed by Catholics to poke fun at the tendency of protestant denominations to multiply exponentially, and to highlight these denominations' homogeneity compared to the ancient tradition of the Apostolic Churches both Western and Eastern.
I attend St. Basil's, but all my friends are protestant... I don't know what denomination, presbylutheranism, I guess, they all look the same to me.