2. One who does mean work for another's advantage, as jackals were once thought to kill game which lions appropriated. [Colloq.] Ld. Lytton.

JACK-A-LENT
Jack"-a-lent, n.

Defn: A small stuffed puppet to be pelted in Lent; hence, a simple fellow.

JACKANAPES Jack"a*napes, n. Etym: [For Jack o' (= of) apes; prop., a man who exhibits apes.] [Written also jackanape.]

1. A monkey; an ape. Shak.

2. A coxcomb; an impertinent or conceited fellow. A young upstart jackanapes. Arbuthnot.

JACKAROO; JACKEROO
Jack`a*roo", n. Also Jack`e*roo". [Jack + kangaroo.]

Defn: A young man living as an apprentice on a sheep station, or otherwise engaged in acquainting himself with colonial life. [Colloq., Australia]

JACKAROO
Jack`a*roo", v. i.

Defn: To be a jackaroo; to pass one's time as a jackaroo. [Colloq.,
Australia]