/jak'euh rooh"/ , n. , pl. jackeroos , v. , jackerooed, jackerooing . Australian.
n.
1. an inexperienced person working as an apprentice on a sheep ranch.
v.i.
2. to work as an apprentice on a sheep ranch.
Also, jackaroo .
[ 1875-80; JACK 1 + (KANG)AROO; cf. -EROO ]