jack in

verb

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

Example Sentences

Even before it kicked in, fast-food giants including Chipotle, McDonald’s, Starbucks, Jack in the Box and Shake Shack warned that they were planning to raise menu prices as a result, leaving customers to eat the cost.

From Los Angeles Times

Miso Robotics, founded in 2016, has tested earlier versions of Flippy in roughly 20 restaurants including White Castle, CaliBurger and Jack in the Box.

From Los Angeles Times

Several chains, including Panera, Jack in the Box, Chipotle and Buffalo Wild Wings, have been testing Miso’s technology since 2021, SEC filings show.

From Los Angeles Times

Police previously said that "about 400 vehicles" would have passed underneath Jack in the time period of the last suspected sightings of him crossing a flyover.

From BBC

Among them is Big Jack, who is named after a Jack in the Box toy due to his alarming propensity for lunging.

From BBC