The difference between Jack and Plug

Jack as a noun:

A mechanical device used to raise and (temporarily) support a heavy object, e.g. screw jack, scissor jack, hydraulic jack, ratchet jack, scaffold jack.

Jack as a noun:

A man or men in general.

Jack as a noun:

A male animal.

Jack as a noun:

A male ass.

Jack as a noun (card games):

A playing card with the letter "J" and the image of a knave or prince on it, the eleventh card in a given suit. Also called a .

Jack as a noun (cricket, by extension):

The eleventh batsman to come to the crease in an innings.

Jack as a noun (archaic):

A knave (a servant or later, a deceitful man).

Jack as a noun (sports):

A target ball in bowls, etc; a jack-ball.

Jack as a noun (games):

A small, six-pointed playing piece used in the game of jacks.

Jack as a noun (colloquial, euphemistic):

Nothing, jack shit.

Jack as a noun (nautical):

A small flag at the bow of a ship.

Jack as a noun (nautical):

A naval ensign flag flown from the main mast, mizzen mast, or the aft-most major mast of (especially) British sailing warships; Union Jack.

Jack as a noun (military):

A coarse and cheap medieval coat of defense, especially one made of leather.

Jack as a noun:

A penny with a head on both sides, used for cheating.

Jack as a noun (slang):

Money.

Jack as a noun (slang, Appalachians):

A smooth often ovoid large gravel or small cobble in a natural water course.

Jack as a noun:

, related to the mango tree.

Jack as a noun:

The freshwater pike, or pickerel.

Jack as a noun:

A large California rockfish, the bocaccio, .

Jack as a noun:

Any of the marine fish in the family Carangidae.

Jack as a noun (obsolete, nautical):

A sailor, a jacktar.

Jack as a noun (obsolete):

A pitcher or can of waxed leather, supposed to resemble a jackboot; a black-jack.

Jack as a noun (UK, dialect, obsolete):

A drinking measure holding half a pint or, sometimes, a quarter of a pint.

Jack as a noun (mining):

A mechanical contrivance, an auxiliary machine, or a subordinate part of a machine. A device to pull off boots. A sawhorse or sawbuck. A machine for turning a spit; a smokejack. A wooden wedge for separating rocks rent by blasting. A lever for depressing the sinkers which push the loops down on the needles in a knitting machine. A grating to separate and guide the threads in a warping machine; a heck box. A machine for twisting the sliver as it leaves the carding machine. A compact, portable machine for planing metal. A machine for slicking or pebbling leather. A system of gearing driven by a horse power, for multiplying speed. A hood or other device placed over a chimney or vent pipe, to prevent a back draught. In the harpsichord, an intermediate piece communicating the action of the key to the quill; also called hopper. In hunting, the pan or frame holding the fuel of the torch used to attract game at night; also, the light itself. 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.

Jack as a noun:

A surface-mounted connector for electrical, especially telecommunications, equipment.

Jack as a noun:

Female ended electrical connector (see Electrical connector)

Jack as a noun:

Electrical connector in a fixed position (see Gender of connectors and fasteners)

Jack as a verb (transitive):

To use a jack.

Jack as a verb (transitive):

To raise or increase.

Jack as a verb:

To produce by freeze distillation; to distil (an alcoholic beverage) by freezing it and removing the ice (which is water), leaving the alcohol (which remains liquid).

Jack as a verb (transitive, colloquial):

To steal something, typically an automobile. Shortened form of carjacking.

Jack as a verb (intransitive):

To dance by moving the torso forward and backward in a rippling motion.

Jack as a noun (slang, baseball):

A home run.

Jack as a verb (transitive, slang, baseball):

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

Jack as a noun:

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

Jack as a noun:

A jackfruit tree.

Plug as a noun (electricity):

a pronged connecting device which fits into a mating socket

Plug as a noun:

any piece of wood, metal, or other substance used to stop or fill a hole

Plug as a noun (US):

a flat oblong cake of pressed tobacco

Plug as a noun (US, slang):

a high, tapering silk hat

Plug as a noun (US, slang):

a worthless horse

Plug as a noun (dated):

Any worn-out or useless article.

Plug as a noun (construction):

a block of wood let into a wall to afford a hold for nails

Plug as a noun (slang):

a mention of a product (usually a book, film or play) in an interview, or an interview which features one or more of these

Plug as a noun (geology):

a body of once molten rock that hardened in a volcanic vent. Usually round or oval in shape.

Plug as a noun (fishing):

a type of lure consisting of a rigid, buoyant or semi-buoyant body and one or more hooks.

Plug as a noun (horticulture):

a small seedling grown in a tray from expanded polystyrene or polythene filled usually with a peat or compost substrate

Plug as a noun:

a short cylindrical piece of jewellery commonly worn in larger-gauge body piercings, especially in the ear

Plug as a noun (slang):

a drug dealer

Plug as a noun:

A branch from a water-pipe to supply a hose.

Plug as a verb (transitive):

to stop with a plug; to make tight by stopping a hole

Plug as a verb (transitive):

to blatantly mention a particular product or service as if advertising it

Plug as a verb (intransitive, informal):

to persist or continue with something

Plug as a verb (transitive):

to shoot a bullet into something with a gun

Plug as a verb (slang, transitive):

to have sex with, penetrate sexually