Origin: bef. 1000; ME; OE cnafa; c. G Knabe boy; akin to ON knapi page, boy
Synonyms: 1.blackguard, villain, scamp, scapegrace. Knave,rascal,rogue,scoundrel are disparaging terms applied to persons considered base, dishonest, or worthless. Knave, which formerly meant merely a boy or servant, in modern use emphasizes baseness of nature and intention: a dishonest and swindling knave. Rascal suggests shrewdness and trickery in dishonesty: a plausible rascal. A rogue is a worthless fellow who sometimes preys extensively upon the community by fraud: photographs of criminals in a rogues' gallery. A scoundrel is a blackguard and rogue of the worst sort: a thorough scoundrel. Rascal and rogue are often used affectionately or humorously (an entertaining rascal; a saucy rogue), but knave and scoundrel are not.
one of a set of small metal objects having six prongs, used in the game of jacks.
b.
one of any other set of objects, as pebbles, stones, etc., used in the game of jacks.
c.
jacks, (used with a singular verb) a children's game in which small metal objects, stones, pebbles, or the like, are tossed, caught, and moved on the ground in a number of prescribed ways, usually while bouncing a rubber ball.
6.
any of several carangid fishes, esp. of the genus Caranx, as C. hippos(crevalle jack or jack crevalle), of the western Atlantic Ocean.
a small wooden rod in the mechanism of a harpsichord, spinet, or virginal that rises when the key is depressed and causes the attached plectrum to strike the string.
18.
Lawn Bowling. a small, usually white bowl or ball used as a mark for the bowlers to aim at.
19.
Also called clock jack.Horology. a mechanical figure that strikes a clock bell.
Falconry. the male of a kestrel, hobby, or esp. of a merlin.
–verb (used with object)
23.
to lift or move (something) with or as if with a jack (usually fol. by up): to jack a car up to change a flat tire.
24.
Informal. to increase, raise, or accelerate (prices, wages, speed, etc.) (usually fol. by up).
25.
Informal. to boost the morale of; encourage (usually fol. by up).
26.
to jacklight.
–verb (used without object)
27.
to jacklight.
–adjective
28.
Carpentry. having a height or length less than that of most of the others in a structure; cripple: jack rafter; jack truss.
—Verb phrase
29.
jack off, Slang:Vulgar. to masturbate.
—Idiom
30.
every man jack, everyone without exception: They presented a formidable opposition, every man jack of them.
Origin: 1350–1400; ME jakke, Jakke used in addressing any male, esp. a social inferior, var. of Jakken, var. of Jankin, equiv. to JanJohn+ -kin-kin; extended in sense to anything male, and as a designation for a variety of inanimate objects
One who works in a specified manual trade. Often used in combination: a lumberjack; a steeplejack.
Jack A sailor; a tar.
jacks(used with a sing. or pl. verb) A game played with a set of small six-pointed metal pieces and a small ball, the object being to pick up the pieces in various combinations.
One of the metal pieces so used.
A usually portable device for raising heavy objects by means of force applied with a lever, screw, or hydraulic press.
A wooden wedge for cleaving rock.
A support or brace, especially the iron crosstree on a topgallant masthead.
A small flag flown at the bow of a ship, usually to indicate nationality.
Abbr. JGames A playing card showing the figure of a servant or soldier and ranking below a queen. Also called knave.
Games
jacks(used with a sing. or pl. verb) A game played with a set of small six-pointed metal pieces and a small ball, the object being to pick up the pieces in various combinations.
One of the metal pieces so used.
A usually portable device for raising heavy objects by means of force applied with a lever, screw, or hydraulic press.
A wooden wedge for cleaving rock.
A support or brace, especially the iron crosstree on a topgallant masthead.
A small flag flown at the bow of a ship, usually to indicate nationality.
Sports A pin used in some games of bowling.
A usually portable device for raising heavy objects by means of force applied with a lever, screw, or hydraulic press.
A wooden wedge for cleaving rock.
A support or brace, especially the iron crosstree on a topgallant masthead.
A small flag flown at the bow of a ship, usually to indicate nationality.
A device used for turning a spit.
Nautical
A support or brace, especially the iron crosstree on a topgallant masthead.
A small flag flown at the bow of a ship, usually to indicate nationality.
The male of certain animals, especially the ass.
Any of several food and game fishes of the family Carangidae, found in tropical and temperate seas.
A jackrabbit.
A socket that accepts a plug at one end and attaches to electric circuitry at the other.
Slang Money.
Applejack.
Slang A small or worthless amount: You don't know jack about that.
v.
jacked, jack·ing, jacks
v.
tr.
To hunt or fish for with a jacklight: hunters illegally jacking deer.
To move or hoist by or as if by using a jack: jacked the rear of the car to replace the tire.
To raise (something) to a higher level, as in cost: "Foreign producers jacked up the price on some steels by over 100%"(Forbes).
Baseball To hit (a pitched ball) hard, especially for a home run.
v.
intr. To hunt or fish for quarry by using a jacklight. Phrasal Verb(s): jack off Vulgar Slang To masturbate.
[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.] jack'er n.
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