code blue

noun

1. (often initial capital letters) a medical emergency in which paramedics are dispatched to aid a person undergoing cardiac arrest.

Word History and Origins

Origin of code blue¹

First recorded in 1980–85

Example Sentences

Over the course of talking to nurses, we realized that many kick off their shoes when they’re sitting at a nurses’ station, but need to put their shoes on very quickly when there’s a code blue alarm.

From Fortune