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1. often Jack Informal A man; a fellow.
a. One who does odd or heavy jobs; a laborer.
b. One who works in a specified manual trade. Often used in combination: a lumberjack; a steeplejack.
c. Jack A sailor; a tar.
3. Abbr. J Games A playing card showing the figure of a servant or soldier and ranking below a queen. Also called knave.
4. Games
a. jacks(used with a sing. or pl. verb) A game played with a set of small, six-pointed, traditionally metal pieces and a small ball, the object being to pick up the pieces in various combinations.
b. One of the six-pointed pieces so used.
5. Sports A pin used in some games of bowling.
a. A usually portable device for raising heavy objects by means of force applied with a lever, screw, or hydraulic press.
b. A wooden wedge for cleaving rock.
7. A device used for turning a spit.
8. Nautical
a. A support or brace, especially the iron crosstree on a topgallant masthead.
b. A small flag flown at the bow of a ship, usually to indicate nationality.
9. The male of certain animals, especially the ass.
10. Any of various food and game fishes of the family Carangidae, found in tropical and temperate seas.
11. A jackrabbit.
12. A socket that accepts a plug at one end and attaches to electric circuitry at the other.
13. Slang Money.
14. Applejack.
15. Slang A small or worthless amount: You don't know jack about that.
v. jacked, jack·ing, jacks
1. To hunt or fish for with a jacklight: hunters illegally jacking deer.
a. To move or hoist by using a jack. Often used with up: jacked the rear of the car to replace the tire.
b. To raise (something) to a higher level, as in cost. Often used with up: "Foreign producers jacked up the price on some steels by over 100%" (Forbes).
3. Baseball To hit (a pitched ball) hard, especially for a home run.
4. Slang
a. To steal: Someone jacked my bike.
b. To rob or cheat: The dealer jacked me on the price.
1. To hunt or fish by using a jacklight.
2. To plug into an electronic device by means of a jack.
Phrasal Verbs:
jack around
1. To spend time idly.
2. To toy, tinker, or mess: He's been jacking around with that motor for days.
3. To take unfair advantage of, deceive, or manipulate.
jack off Vulgar Slang
1. To masturbate. Usually used of a man.
2. To bring (someone) to orgasm.
jack up
To excite emotionally.

[From the name Jack, from Middle English Jakke, possibly from Old French Jacques, from Late Latin Iacōbus; see Jacob. N., sense 15, short for jack shit. V. tr., senses 4a and b, short for hijack.]

jack′er n.


a labourer
References in periodicals archive ?
o tackled an armed car jacker could become the nation's top delivery man.
A CAR jacker who took a teenager on a terror ride through the streets of Birmingham has been jailed for three years at the city's Crown Court.
ESTATE agent Tim Robinson was murdered by a notorious car- jacker because he was in the wrong place at the wrong time, a court heard yesterday.
ISLAMABAD -- Special Investigation Unit of Islamabad Police has busted an inter-provincial gang involved in selling stolen cars after tempering them and also recovered an excavator from such a car jacker, a police spokesman said on Sunday.
4) DJ Hyperactive - Wide Open (Paul Woolford Re-Edit - Unreleased) A reworking of this raw jacker from yesteryear that I included in my forthcoming Essential Mix for Radio 1.
99) DETECTIVE Jack Caffery is sent to interview a distraught victim of a violent car-jacking incident, but unlike regular car thefts, the jacker forced the victim into giving up her car along with her 11-year-old daughter on the back seat.
jacker did: Just when you're really getting involved in the characters' lives, something contrived happens and you have to start being convinced all over again.
Moreover, the jacker seems to know Caffery and his team's every move.