A code used by airplanes to say that there is an imminent hijacking. They do so by resetting their transponder to 7500.
Airplane Pilot: *squawks 7500*
ATC: oh shit shoot him down
Other ATC: why tho
ATC: he used his transponder to Squawk 7500
Other ATC: ok
ATC: oh shit shoot him down
Other ATC: why tho
ATC: he used his transponder to Squawk 7500
Other ATC: ok
by Veteran Bandit September 9, 2020