jack

1 noun (C)

1 TOOL FOR LIFTING 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 CARD GAMES 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: a pair of jacks

3 ELECTRICAL an electronic connection for a telephone or other electric machine

4 CHILDREN'S GAME

a) jacks (plural) a children's game in which the players try to pick up small objects while bouncing bounce and catching a ball

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

5 BALL a small white ball at which players aim larger balls in the game of bowls bowl 1 (3a)

6 I'm all right, Jack BrE usually spoken someone with an I'm all right Jack attitude is happy with their life and does not care about other people

7 PERSON every man jack BrE old-fashioned every single person; everyone: Every man jack of them is without a job.

8 jack shit/diddly AmE spoken an impolite expression meaning nothing at all: He knows jack shit about cars.

—see also: jumping jack, Union Jack 2 verb jack sb around phrasal verb (T) AmE slang to waste someone's time by deliberately making things difficult for them: Stop jacking me around and make up your mind! jack sth in phrasal verb (T) BrE informal to stop doing something: I'd love to jack in my job and go live in the Bahamas. jack off phrasal verb (I, T) AmE taboo to masturbate jack sb/sth up phrasal verb (T)

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: jacking up their profit margins

3 be jacked up AmE informal to be excited and nervous