scramble
What does scramble mean?
The flat-out, drop-everything launch of fighters to meet an unidentified or hostile aircraft. Klaxon goes, pilots sprint to the jets, wheels up in minutes. Born in the Battle of Britain when RAF Fighter Command needed Spitfires and Hurricanes airborne before the Luftwaffe arrived overhead. Still the term NATO air forces use today for quick-reaction alert launches.
Origin
RAF Fighter Command, Battle of Britain (1940). Pilots were ordered to 'scramble' to their aircraft as fast as humanly possible.