Blaintology was the religion (i.e. cult) featured in the episode "Super Best Friends". Their followers are the Blaintologists, who followed David Blaine and his teachings. Followers had to have a shaved head, whether they were male or female; this confused a few characters as they couldn't tell who was who, Stan even questions who he is at one point, and has to put his poofball hat back on.
Blaintologists were multi-cultural and any religion was welcome, even if someone was already Jewish (like Kyle) or any other religion (most Blaintologists were Roman Catholic). A book written by David Blaine about his "miracles" entitled "David Blaine: Teachings", was used as a sort of holy book in the religion. Blaine tries to make his religion tax exempt, unfortunately for him the request is denied and so he persuades his followers to commit a mass suicide to protest and force approval of the tax exemptment title; but the Super Best Friends (Jesus, Buddha, Moses, Muhammad, Seaman, Joseph Smith, Krishna and Lao Tse) managed to convert his followers back to their original beliefs by causing him to flee which therefore destroyed their faith in him as he abandoned them.