Definition from Wiktionary, the free dictionary
- (transitive, idiomatic, UK) To stop doing a regular activity. Often a job or studies.
- I've had enough of working nights, so I'm going to jack in my job.
- I'm going to jack my job in.
- (music recording, computing, electronics) To insert an electronic coupling into a receptacle; to connect to something, whether involving a physical medium or not.
- jack it in UK
- In the British idiom, the object may appear before or after the particle. If the object is a pronoun, then it must be before the particle.