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Definition jack in British English

jack verb

verb
/dʒæk/
2

to treat someone badly because you are not clear or honest with them

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3

to stop doing something, especially a job or a course of study

Example

Did you know that Jenna's jacked in her college course?

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4

to connect two pieces of electronic or computer equipment so that you can start using them

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5

to use a jack to lift and support a heavy object, especially a car

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6

to increase the price, rate, or number of something by a large amount

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7

to put an illegal drug into your body using a needle

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7.1

to be very excited or nervous, especially because you have taken an illegal drug

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Definition jack in British English