jack

Universal Words noun, verb noun 1 [C] a device for raising heavy objects off the ground, especially motor vehicles so that a wheel can be changed 2 [C] an electronic connection between two pieces of electrical equipment 3 [C] (in a pack / deck of cards) a card with a picture of a young man on it, worth more than a ten and less than a queen: the jack of clubs 4 [C] (in the game of BOWLS) a small white ball towards which players roll larger balls 5 (jacks) [pl.] a children's game in which players bounce a small ball and pick up small metal objects, also called jacks before catching the ball seealsoBLACKJACK, FLAPJACK, UNIONJACK IDIOMS a jack of all trades a person who can do many different types of work, but who perhaps does not do them very well moreatALLRIGHTadj. verb PHRASALVERBS jack sth<->in (BrE, informal) to decide to stop doing sth, especially your job: After five years, he decided to jack it all in. jack off (!!!, slang) (of a man) to MASTURBATE jack sth<->up 1 to lift sth, especially a vehicle, off the ground using a jack: Thieves jacked up the car and stole the wheels. 2 (informal) to increase sth, especially prices, by a large amount