gidgee /ˈɡɪd͡ʒi/ noun2 •(Australia) Any of various trees of the genus Acacia, especially Acacia cambagei.Acacia homalophylla, A. Cunn., B. Fl., ii., 383. "Curly or Narrow-leaved Yarran." A "Myall." Called also "Gidgee." — 1890 •(Australia) A type of long spear.“What say we catch gilgies? I've got a gidgee hidden down the river bank. There's some real big ones this time of year.” — 1965 formsgidgees