jack in

present singular third person jacks in · participle present jacking in · participle past jacked in · past jacked in

1. UKidiomatictransitiveTo stop doing a regular activity, such as a job or studying.

   I'm going to jack my job in.

   2 more examples

   I've had enough of working nights, so I'm going to jack in my job.

   And when I came round, after a couple of months of darkness, I found to my surprise that I had jacked in my course and was working in Record and Tape Exchange in Camden.

   1995, Nick Hornby, High Fidelity, London: Victor Gollancz, →ISBN, page 26

2. music recordingbusinessTo insert an electronic coupling into a receptacle; to connect to something, whether involving a physical medium or not.
3. ambitransitiveliteratureTo connect a brain directly to a computer.

   Seven days and he'd jack in. If he closed his eyes now, he'd see the matrix.

   1984, William Gibson, Neuromancer (Sprawl; book 1), New York, N.Y.: Ace Books, →ISBN, page 37

   2 more examples

   Watchman replaced him in the linkup seat. He jacked himself into the computer.

   1970 June, Robert Silverberg, “The Tower of Glass”, in Galaxy Science Fiction, volume 30, number 3, page 141

   She couldn't move, not without that extra skeleton, and it was jacked straight into her brain, myoelectric interface.

   1986, William Gibson, “Winter Market”, in Burning Chrome, page 129