Tapdog is an Australian Thoroughbred racehorse who became the first horse to win the unlisted Geraldton Gold Cup three times. He is a brown gelding that was foaled on 9 October 1997. Tapdog was bred in New South Wales by Doomland Pty Ltd. He is by Bletcharm and his dam Starjazz (Ireland) was by Dancing Dissident (USA). He was sold at the 1999 yearling sale in Scone, New South Wales. His owners are Peter H. Day, Hans J. Hoiskar, and Peter R. Day. He was trained by Clive Lauritsen in Geraldton, Western Australia.