Mr. Prusko is such a boring teacher that students can't even stay awake in class, so Lex and Presley make a deal to make him cooler in exchange for good grades, but Mr. Prusko becomes too cool and is now known as Mr. P.
A religion is a belief system with rituals. The missionary kopimistsamfundet is a religious group centered in Sweden who believe that copying and the sharing of information is the best and most beautiful that is. To have your information copied is a token of appreciation, that someone think you have done something good.