What Does โJack sb inโ Mean?
โJack sb inโ is an informal phrasal verb meaning to stop working or to quit a task, often used when someone gives up on an activity or job.
Introduction
The phrase โJack sb inโ is commonly used in informal English to describe the act of quitting or stopping something, especially work or an activity. The โsbโ stands for โsomebody,โ meaning a person who decides to give up or withdraw from what they are doing. Understanding the Jack sb in meaning helps you recognize when someone has decided to stop participating or working on a task. This phrasal verb is useful in everyday conversations and informal writing. Learning how to use it correctly will make your English sound more natural and fluent.
Quick Info Box
- Phrasal verb: Jack somebody in
- Type: Transitive
- Level: B2
- Short meaning: To quit or stop doing something
Structure (Grammar Rules)
โJack sb inโ is a separable phrasal verb. This means you can place the object (somebody) either between โjackโ and โinโ or after the entire phrase.
- Jack somebody in
- Jack in somebody
However, the most common and natural form is โjack somebody in.โ
Example pattern: Subject + jack + somebody + in
How to Use โJack sb inโ?
This phrasal verb is mainly used when talking about quitting a job, activity, or task. It is informal and often used in casual conversations. You can use it to describe someone stopping their work or leaving a responsibility.
Example: โHe jacked in his job last week because he was unhappy.โ
Examples
Imagine a friend telling you they stopped working at their old company.
- After months of stress, she finally jacked in her position.
- He decided to jack in the project when it became too difficult.
- Many workers jacked in during the strike.
- Jack in your worries and enjoy the weekend!
- She jacked in the training session early.
Here is โJack sb inโ in a sentence: โJohn jacked in his job because he wanted a career change.โ
Common Mistakes
People often confuse the placement of the object or use the phrase too formally.
- Incorrect: โHe jacked in last his job.โ
- Correct: โHe jacked in his job last week.โ
- Incorrect: โI will jack in the work tomorrow.โ
- Correct: โI will jack in my work tomorrow.โ
Remember, โJack sb inโ is informal, so avoid using it in formal writing.
Differences / Synonyms
Other phrasal verbs like โgive up,โ โquit,โ and โdrop outโ have similar meanings but different uses.
- Give up: To stop trying, often related to effort.
- Quit: To leave a job or activity permanently.
- Drop out: To leave a course or activity before finishing.
โJack sb inโ is more casual and often used in British English to mean quitting something suddenly or decisively.
Common Collocations
You often see โjack sb inโ used with jobs, projects, activities, or tasks.
- Jack in a job: To quit a job
- Jack in a project: To stop working on a project
- Jack in a task: To give up a task
- Jack in work: To stop working
Related Phrasal Verbs
Here are related phrasal verbs of jack sb in:
Real-life Dialogue
Here is a short conversation using โJack sb inโ:
Anna: Did you hear Tom jacked in his job yesterday?
Ben: Really? Why did he do that?
Anna: He said the stress was too much, so he decided to jack in and look for something else.
Practice
Try to complete the sentence with the correct form of โjack sb inโ:
- After years of working late nights, she finally ________ her job.
- They decided to ________ the project because it was too expensive.
Answers:
- jacked in
- jack in
FAQs
- What does โjack sb inโ mean? It means to quit or stop doing something.
- Is โjack sb inโ formal? No, it is informal and used mainly in casual speech.
- Can โjack sb inโ be used with any activity? Mostly with jobs, tasks, or projects.
- Is โjack sb inโ a separable phrasal verb? Yes, you can place the object between the verb and particle.
- Are there synonyms for โjack sb inโ? Yes, such as โquit,โ โgive up,โ or โdrop out.โ

