A jack constructed of compound levers pivoted together.

simple past tense and past participle of jack around

present participle of jack around

(obsolete) A beggar who pretends to have been on great sea voyages.

(historical) An apparatus for turning the spit on which meat is roasted.

(automotive, largely historical) A jack designed to lift a car by its bumper.

(US, slang, naval) A jack-of-the-dust: a storekeeper in charge of dry foodstuffs.

Merluccius productus, a ray-finned fish found in the northeast Pacific Ocean. / A Chinook salmon that returns to the fresh water one or two years early. / (colloquial) Sander canadensis.

plural of Jack Shalloo

(dated, naval slang) A (male) braggart. / (dated, naval slang) A careless or happy-go-lucky man.