What is "jack rabbit"

Jack \Jack\ (j[a^]k), n. [F. Jacques James, L. Jacobus, Gr. ?, Heb. Ya 'aq[=o]b Jacob; prop., seizing by the heel; hence, a supplanter. Cf. Jacobite, Jockey.]

1. A familiar nickname of, or substitute for, John.

   You are John Rugby, and you are Jack Rugby.
   --Shak.

2. An impertinent or silly fellow; a simpleton; a boor; a clown; also, a servant; a rustic. ``Jack fool.''
   --Chaucer.

   Since every Jack became a gentleman, There 's many a gentle person made a Jack.
   --Shak.

3. A popular colloquial name for a sailor; -- called also Jack tar, and Jack afloat.

4. A mechanical contrivance, an auxiliary machine, or a subordinate part of a machine, rendering convenient service, and often supplying the place of a boy or attendant who was commonly called Jack; as:

   1. A device to pull off boots.

   2. A sawhorse or sawbuck.

   3. A machine or contrivance for turning a spit; a smoke jack, or kitchen jack. (b) (Mining) A wooden wedge for separating rocks rent by blasting. (e) (Knitting Machine) A lever for depressing the sinkers which push the loops down on the needles. (f) (Warping Machine) A grating to separate and guide the threads; a heck box. (g) (Spinning) A machine for twisting the sliver as it leaves the carding machine. (h) A compact, portable machine for planing metal. (i) A machine for slicking or pebbling leather. (k) A system of gearing driven by a horse power, for multiplying speed. (l) A hood or other device placed over a chimney or vent pipe, to prevent a back draught. (m) In the harpsichord, an intermediate piece communicating the action of the key to the quill; -- called also hopper. (n) In hunting, the pan or frame holding the fuel of the torch used to attract game at night; also, the light itself.
      --C. Hallock.

5. A portable machine variously constructed, for exerting great pressure, or lifting or moving a heavy body such as an automobile through a small distance. It consists of a lever, screw, rack and pinion, hydraulic press, or any simple combination of mechanical powers, working in a compact pedestal or support and operated by a lever, crank, capstan bar, etc. The name is often given to a jackscrew, which is a kind of jack.

6. The small bowl used as a mark in the game of bowls.
   --Shak.

   Like an uninstructed bowler who thinks to attain the jack by delivering his bowl straight forward upon it.
   --Sir W. Scott.

7. The male of certain animals, as of the ass.

8. (Zo["o]l.)

   1. A young pike; a pickerel.

   2. The jurel.

   3. A large, California rock fish ( Sebastodes paucispinus); -- called also boccaccio, and m['e]rou.

   4. The wall-eyed pike.

9. A drinking measure holding half a pint; also, one holding a quarter of a pint. [Prov. Eng.]
   --Halliwell.

10. (Naut.)

    1. A flag, containing only the union, without the fly, usually hoisted on a jack staff at the bowsprit cap; -- called also union jack. The American jack is a small blue flag, with a star for each State.

    2. A bar of iron athwart ships at a topgallant masthead, to support a royal mast, and give spread to the royal shrouds; -- called also jack crosstree.
       --R. H. Dana, Jr.

11. The knave of a suit of playing cards.

12. (pl.) A game played with small (metallic, with tetrahedrally oriented spikes) objects (the jacks(1950+), formerly jackstones) that are tossed, caught, picked up, and arranged on a horizontal surface in various patterns; in the modern American game, the movements are accompanied by tossing or bouncing a rubber ball on the horizontal surface supporting the jacks. same as jackstones.

13. Money. [slang]

14. Apple jack.

15. Brandy. Note: Jack is used adjectively in various senses. It sometimes designates something cut short or diminished in size; as, a jack timber; a jack rafter; a jack arch, etc. Jack arch, an arch of the thickness of one brick. Jack back (Brewing & Malt Vinegar Manuf.), a cistern which receives the wort. See under 1st Back. Jack block (Naut.), a block fixed in the topgallant or royal rigging, used for raising and lowering light masts and spars. Jack boots, boots reaching above the knee; -- worn in the 17 century by soldiers; afterwards by fishermen, etc. Jack crosstree. (Naut.) See 10, b, above. Jack curlew (Zo["o]l.), the whimbrel. Jack frame. (Cotton Spinning) See 4 (g), above. Jack Frost, frost or cold weather personified as a mischievous person. Jack hare, a male hare. --Cowper. Jack lamp, a lamp for still hunting and camp use. See def. 4 (n.), above. Jack plane, a joiner's plane used for coarse work. Jack post, one of the posts which support the crank shaft of a deep-well-boring apparatus. Jack pot (Poker Playing), the name given to the stakes, contributions to which are made by each player successively, till such a hand is turned as shall take the ``pot,'' which is the sum total of all the bets. See also jackpot. Jack rabbit (Zo["o]l.), any one of several species of large American hares, having very large ears and long legs. The California species ( Lepus Californicus), and that of Texas and New Mexico ( Lepus callotis), have the tail black above, and the ears black at the tip. They do not become white in winter. The more northern prairie hare ( Lepus campestris) has the upper side of the tail white, and in winter its fur becomes nearly white. Jack rafter (Arch.), in England, one of the shorter rafters used in constructing a hip or valley roof; in the United States, any secondary roof timber, as the common rafters resting on purlins in a trussed roof; also, one of the pieces simulating extended rafters, used under the eaves in some styles of building. Jack salmon (Zo["o]l.), the wall-eyed pike, or glasseye. Jack sauce, an impudent fellow. [Colloq. & Obs.] Jack shaft (Mach.), the first intermediate shaft, in a factory or mill, which receives power, through belts or gearing, from a prime mover, and transmits it, by the same means, to other intermediate shafts or to a line shaft. Jack sinker (Knitting Mach.), a thin iron plate operated by the jack to depress the loop of thread between two needles. Jack snipe. (Zo["o]l.) See in the Vocabulary. Jack staff (Naut.), a staff fixed on the bowsprit cap, upon which the jack is hoisted. Jack timber (Arch.), any timber, as a rafter, rib, or studding, which, being intercepted, is shorter than the others. Jack towel, a towel hung on a roller for common use. Jack truss (Arch.), in a hip roof, a minor truss used where the roof has not its full section. Jack tree. (Bot.) See 1st Jack, n. Jack yard (Naut.), a short spar to extend a topsail beyond the gaff. Blue jack, blue vitriol; sulphate of copper. Hydraulic jack, a jack used for lifting, pulling, or forcing, consisting of a compact portable hydrostatic press, with its pump and a reservoir containing a supply of liquid, as oil. Jack-at-a-pinch.

    1. One called upon to take the place of another in an emergency.

    2. An itinerant parson who conducts an occasional service for a fee.

       Jack-at-all-trades, one who can turn his hand to any kind of work.

       Jack-by-the-hedge (Bot.), a plant of the genus Erysimum ( Erysimum alliaria, or Alliaria officinalis), which grows under hedges. It bears a white flower and has a taste not unlike garlic. Called also, in England, sauce-alone.
       --Eng. Cyc.

       Jack-in-office, an insolent fellow in authority.
       --Wolcott.

       Jack-in-the-bush (Bot.), a tropical shrub with red fruit ( Cordia Cylindrostachya).

       Jack-in-the-green, a chimney sweep inclosed in a framework of boughs, carried in Mayday processions.

       Jack-of-the-buttery (Bot.), the stonecrop ( Sedum acre).

       Jack-of-the-clock, a figure, usually of a man, on old clocks, which struck the time on the bell.

       Jack-on-both-sides, one who is or tries to be neutral.

       Jack-out-of-office, one who has been in office and is turned out.
       --Shak.

       Jack the Giant Killer, the hero of a well-known nursery story.

       Yellow Jack (Naut.), the yellow fever; also, the quarantine flag. See Yellow flag, under Flag.

Jack Rabbit is a wooden roller coaster located at Kennywood Park in West Mifflin, Pennsylvania, near Pittsburgh, USA.

Designed and built by John A. Miller and Harry C. Baker in 1921, it is one of the oldest still-running roller coasters in the world. The ride's three trains were manufactured by Edward Vettel, Sr. in 1951 and contain three cars of six seats each. The aging cars are considered a part of the ride's nostalgic experience but also lead to some young children being disallowed to enter the ride (36" is the minimum), due to the use of a small lapbar to hold in riders. A popular early feature of the ride was a tunnel which covered the turnaround section after the first drop, but this was removed in 1947 when the new cars were ordered. In 1991, the tunnel was restored, at a slightly shorter length.

The Jack Rabbit was built shortly after Miller patented a new track design in 1921 (which all wooden coasters built since have used). This design involved the use of wheels both under and over the track, which allowed Miller to create the then enormous drop that is the attraction's largest. It is most well known for its double dip following the lift hill. The double dip produces strong airtime that makes the rider feel that they will be thrown from the seat, and a feeling that the train leaves the track (it rises up but the upstop wheels keep it firmly on the rails).

According to Rick Sebak, producer of Pittsburgh history programs for WQED, the attraction was designed so that each train's last seat would provide the strongest airtime, and therefore the most desired ride.

Jack Rabbit is an " out and back" wooden roller coaster located at Seabreeze Amusement Park in Irondequoit, New York. At its opening in 1920, it was the fastest roller coaster in the world. The Giant Dipper in Santa Cruz, California, superseded it in 1924. Jack Rabbit is the fourth oldest operating roller coaster in the world and the second oldest in the USA. The oldest, Leap-The-Dips in Altoona, Pennsylvania, was closed from 1985 to 1999, making Jack Rabbit the oldest continuously operating coaster in the country.

Jack Rabbit has been described as a hard ride to learn to operate; there are several brake levers, and it takes a while to learn the proper timing and sequence to accurately stop the train at the platform.