blackboy

noun2

1. •
   (Australia) Any plant in the genus Xanthorrhoea, native to Australia.

   • The gum from the blackboy trees was used for the making of varnish and stain, […] — 1966
2. •
   (offensive, no longer used) An Aboriginal boy or servant.

   • September 30th, 1905.—Examined some hills in the locality. A Chinaman and some blackboys are camped here with some cattle belonging to the Mount Diamond butcher. — 1906