A Jack, also Knave, is a playing card which, in traditional American and English decks, pictures a man in the traditional or historic aristocratic dress generally associated with Europe of the 16th or 17th century. The usual rank of a Jack, within its suit, plays as if it were an 11 . As the lowest face card, the Jack often represents a minimum standard — for example, many poker games require a minimum hand of a pair of Jacks in order to continue play.

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J.A.C.K. is the third studio album by American pop punk band Forever the Sickest Kids. It is their first release through Fearless Records since their former label, Universal Motown, was shut down and is also the first release to not feature keyboardist Kent Garrison and lead guitarist Marc Stewart. The album was produced by Mike Green and was released on June 25, 2013.

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  1. A mechanical device used to raise and (temporarily) support a heavy object.
    She used a jack to lift her car and changed the tire.
  2. A man or men in general.
    Every man jack.
  3. A male animal.
  4. The card ranking between the and of any suit, picturing a knave or prince on its face. In some card games has a value of eleven based on its rank, but in many card games has a value of ten like the ten, queen, and cards. Also called a knave.
  5. A knave (a servant or later, a deceitful man).
  6. A male ass.
  7. , related to the mango tree.
  8. A surface-mounted connector for electrical, especially telecommunications, equipment.
    telephone jack
  9. A target ball in bowls, etc; a jack-ball.
  10. A small, six-pointed playing piece used in the game of jacks.
  11. Nothing, jackshit.
    You haven't done jack. Get up and get this room cleaned up right now!
  12. A small flag at the bow of a ship.
  13. A naval ensign flag flown from the main mast, mizzen mast, or the aft-most major mast of (especially) British sailing warships; Union Jack.
  14. A coarse and cheap medieval coat of defense, especially one made of leather.
  15. A penny with a head on both sides, used for cheating. (Reference: Sidney J. Baker, The Australian Language, second edition, 1966, chapter XI section 3, page 243.)
  16. Money.
  17. A smooth often ovoid large gravel or small cobble in a natural water course.
  18. A common name for the freshwater pike, green pike or pickerel.
  19. A large California rockfish.
  20. Any marine fish or the species of the Carangidae family.
  21. A sailor; a "jack tar".
  22. A pitcher or can of waxed leather, supposed to resemble a jackboot; a black-jack.
  23. A drinking measure holding half a pint or, sometimes, a quarter of a pint.
  24. A mechanical contrivance, an auxiliary machine, or a subordinate part of a machine.
    1. A device to pull off boots.
    2. A sawhorse or sawbuck.
    3. A machine for turning a spit; a smokejack.
    4. A wooden wedge for separating rocks rent by blasting.
    5. A lever for depressing the sinkers which push the loops down on the needles in a knitting machine.
    6. A grating to separate and guide the threads in a warping machine; a heck box.
    7. A machine for twisting the sliver as it leaves the carding machine.
    8. A compact, portable machine for planing metal.
    9. A machine for slicking or pebbling leather.
    10. A system of gearing driven by a horse power, for multiplying speed.
    11. A hood or other device placed over a chimney or vent pipe, to prevent a back draught.
    12. In the harpsichord, an intermediate piece communicating the action of the key to the quill; also called hopper.
    13. In hunting, the pan or frame holding the fuel of the torch used to attract game at night; also, the light itself.
    14. A bar of iron athwart ships at a topgallant masthead, to support a royal mast, and give spread to the royal shrouds; also called jack crosstree.

Noun (etymology 2)

  1. A coarse mediaeval coat of defence, especially one made of leather.

Noun (etymology 3)

  1. A jackfruit tree.


  1. To use a jack.
    He jacked the car up so that he could replace the brake pads.
  2. To raise or increase.
    If you want to jack your stats you just write off failures as invalid results.
  3. To steal something, typically an automobile. Contraction of carjacking
    Someone jacked my car last night!

Verb (etymology 2)

  1. To hit (the ball) hard; especially, to hit (the ball) out of the field, producing a home run.

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