Who is John the Baptist from Lamb: The Gospel According to Biff and what is their importance?

John the Baptist is Joshua's cousin. Some think that John is the Messiah, but later side with Jesus after Herod beheads John. Looking and acting quite insane, John lives in a pit and eats only honey and locusts. When he baptizes, he nearly drowns his followers. Herod ignores him until John starts calling Herod's wife a slut, something his mind latches onto and cannot let go. John's greatest claim to fame is that he baptizes Joshua, and his greatest contribution is preparing the way for the Messiah.