It was an attempt to evoke an old Hawaiian Pidgin English joke, based on the word kau-kau , which means both to eat and food to be eaten (think 'feed' in the sense of animal feed and to eat) and a debate between two farmers as to whose animal, one farmer's horse vs the others cow, got into the feed supply.
It ended up with the horse's owner screaming: "Horse no kau-kau cow kau-kau, COW kau-kau cow kau-kau!"