jack in

British

verb

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.

Chains including Burger King, Wendy’s and Jack in the Box have all said they expect beef inflation to pressure their profits.

From The Wall Street Journal

“Honk, whuffle, grunt,” said Jack in his best sea lion voice.

From Literature

Mr. Hayes, who rose to fame as the flamboyant sidekick Jack in “Will & Grace,” here gives his finest stage performance to date.

From The Wall Street Journal

Jack in the Box - Baldwin Park When: Noon to 3 p.m.

From Los Angeles Times

Jack in the Box’s “Jibbis” are coming for Labubus.

From MarketWatch

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023