Meaning of JACK in English

I. jack 1 /dʒæk/ BrE AmE noun [countable]

[ Date: 1300-1400 ; Origin: From the man's name Jack ]

1 . a piece of equipment used to lift a heavy weight off the ground, such as a car, and support it while it is in the air:

a hydraulic jack

2 . a card used in card games that has a man’s picture on it and is worth less than a queen and more than a ten

jack of hearts/clubs etc

a pair of jacks

3 . an electronic connection for a telephone or other electric machine:

a phone jack

4 .

a) jacks [plural] a children’s game in which the players try to pick up small objects called jacks while ↑ bouncing and catching a ball

b) a small metal or plastic object that has six points, used in this game

5 . a small white ball at which players aim larger balls in the game of ↑ bowl s

6 . jack (shit) American English spoken not polite a rude expression meaning anything at all:

He doesn’t know jack shit about cars.

⇨ ↑ jumping jack , ↑ Union Jack

II. jack 2 BrE AmE verb

jack somebody around phrasal verb

American English spoken to waste someone’s time by deliberately making things difficult for them:

Stop jacking me around and make up your mind!

jack something ↔ in phrasal verb

British English informal to stop doing something:

I’d love to jack in my job and go and live in the Bahamas.

jack off phrasal verb

American English informal not polite to ↑ masturbate

jack something ↔ up phrasal verb

1 . to lift something heavy off the ground using a jack:

Jack the car up higher – I can’t get the tire off.

2 . informal to increase prices, sales etc by a large amount:

They’re just interested in jacking up their profit margins.

Longman Dictionary of Contemporary English.      Longman - Словарь современного английского языка.