jack

jack

I

jack¹ /dʒæk/ noun [countable]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 bowls
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

jack² 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.