What is a rogue shark? How did this term come about?

Dr. Sir Victor Coppleson, an Australian surgeon, coined the phrase "rogue shark," feeling there was evidence that if a shark experiences killing or mauling humans, he goes in search of more human prey. Coppleson based his theory on the incidence of shark attacks that occurred after the advent of the sport of surfing in 1919. In 1922, two surfers were attacked and killed at the same location, Coogee Beach, by large sharks that struck them with such force that they were lifted from the water. Several other swimmers lost limbs in the same area. When the attacks stopped, Coppleson took it as evidence that the attacks were by the same rogue shark that had either died or moved on.