jackaroo
noun /ˌdʒækəˈruː/
  /ˌdʒækəˈruː/
 (plural jackaroos)
 (Australian English, New Zealand English, informal)- a young man who is working on a farm in Australia/New Zealand to get experience compare jillarooTopics Farmingc2Word Originlate 19th cent.: perhaps a blend of jack and kangaroo.