killcode
nounUK /ˈkɪl.kəʊd/
US /ˈkɪl.koʊd/
A special set of letters or numbers that stops a computer program or machine.
The technician typed the killcode to shut down the runaway robot.
OTHER MEANINGS
2. A hidden instruction in a game that removes or defeats a character.
He entered the killcode and the boss monster vanished.
3. A secret signal used to end a mission or operation.
The spy sent the killcode to abort the plan.
4. A piece of programming that permanently disables a device.
The company added a killcode to protect stolen phones.