jackaroo noun 2verb 1forms 3 noun2 •(Australia) A trainee station manager or owner, working as a stockman or farm hand; formerly, a young man of independent means working at a station in a supernumerary capacity to gain experience.But this is the tale of a Jackaroo that came from a foreign strand, / And the fight that he fought with Saltbush Bill, the King of the Overland. — 1895 •(Australia, no longer used) A white man living outside of a white settlement. verb1 •To work as a jackaroo.Bill has gone jackarooing out west. formsjackarooed · jackarooing · jackaroos