\Jack`a*roo"\, n. Also Jackeroo \Jack`e*roo"\ [Jack +
kangaroo.]
A young man living as an apprentice on a sheep station, or
otherwise engaged in acquainting himself with colonial life.
[Colloq., Australia]

\Jack`a*roo"\, v. i.
To be a jackaroo; to pass one's time as a jackaroo. [Colloq.,
Australia]