单词	jack
释义	noun | verb jackjack1 /dʒæk/ noun Etymology ETYMOLOGYjack1 Origin: 1300-1400 From the man's name Jack 1 [countable] 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 jack2[countable] 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:  the jack of hearts3[countable] an electronic connection for a telephone or other electric machine:  a phone jack4jacks [uncountable] a children’s game in which the players try to pick up small objects (=jacks) while bouncing (bounce) and catching a ball5[countable] a small metal or plastic object that has six points, used in the game of jacks noun | verb jackjack2 verb Verb Table VERB TABLE jack Simple Form Present I, you, we, they jack he, she, it jacks Past I, you, he, she, it, we, they jacked Present perfect I, you, we, they have jacked, jack he, she, it has jacked, jack Past perfect I, you, he, she, it, we, they had jacked, jack Future I, you, he, she, it, we, they will jack Future perfect I, you, he, she, it, we, they will have jacked, jack Continuous Form Present I am jacking he, she, it is jacking you, we, they are jacking Past I, he, she, it was jacking you, we, they were jacking Present perfect I, you, we, they have been jacking he, she, it has been jacking Past perfect I, you, he, she, it, we, they had been jacking Future I, you, he, she, it, we, they will be jacking Future perfect I, you, he, she, it, we, they will have been jacking be jacked (up) slang to be excited and nervous, often because of taking drugsjack somebody around phrasal verb spoken informal to waste someone’s time by deliberately making things difficult for him or her:  Quit jacking me around, and just tell me!jack something up phrasal verb1to lift something heavy such as a car off the ground using a jack2informal to increase prices, sales, etc. by a large amount:  Local sales tax really jacks the prices up.
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