What is "dick-a-dick"

Dick-a-Dick (traditional name Djungadjinganook, Jumgumjenanuke or Jungunjinuke, c.1834–3 September 1870) was an Australian Aboriginal tracker and cricketer, a Wotjobaluk man who spoke the Wergaia language in the Wimmera region of western Victoria, Australia. He was a member of the first Australian cricket team to tour England in 1868 and was one of the most well-known Aborigines of the nineteenth century.