When you are in a public toilet and have access to all of the hand dryers, so instead of using one you hold out your hands like some sort of Messiah and use two.
Generally a name gifted to the greatest punter on earth. Someone who can pull you out of the fire with an epic roughie, or snare you a big win with the top weight in the last. If you ever find a friend who is good enough to be deemed The Messiah, you are truly blessed..!