One of 254 counties in Texas, United States. County seat: Jacksboro.

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

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

A jack constructed of compound levers pivoted together.

A figure which strikes the hour on the bell of some fanciful clocks; Jack o' the clock. / (obsolete) A timeserver; an inconstant person.

(obsolete, mineralogy, UK) Sphalerite; zincblende. / (obsolete) Caramel or burnt sugar, used to colour wines, spirits, ground coffee, etc. / (obsolete) A large leather vessel for beer, etc.

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

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

plural of Jack Shalloo

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.