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jack in

British  

verb

  1. slang (tr, adverb) to abandon or leave (an attempt or enterprise)

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Farron's flag also featured a union jack in one corner.

From BBC • Sep. 20, 2025

“Magazines; more records; books; memorabilia; programs; CDs; VHS; stacking dolls. There’s a jack in the box with a Barbra inside; a Fabergé-style egg.”

From Los Angeles Times • Dec. 18, 2023

So I bought this receiver, which plugs into the audio jack in my car and then connects to my phone via Bluetooth.

From The Verge • May 3, 2022

It’s the hottest, pepper-iest pepper jack in the world.

From Washington Post • Jun. 19, 2019

I have a hard time looking jack in the eye, even though we’re friends now.

From "The House That Lou Built" by Mae Respicio

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