Antipope is a Pope who actually goes against the teachings of the Catholic Church: female, gay, married priests and so on. One who corrupts the Church. There were several of them in the early centuries.
I owned a Plymouth Voyager, the anti-Chrysler: darn thing kept getting re-possessed.
But seriously, take my wife . . .
Does this then result in factionalism?
Will we be seeing Catholic "sunnis" verses Catholic "shiites"?