blue shirt

noun3

1. •
   A sailor who works on the flight deck of an aircraft carrier, securing aircraft to the deck.

   • Then, out of the comer of my eye, I saw a blue shirt get blown down the flight deck. — 1992
2. •
   (US) An emergency medical service worker; a paramedic.

   • If a prosecutor argues a case in which a blue-shirt was murdered on the job, attacks on a rescuer may be a factor in seeking the death penalty. — 2002
3. •
   An Alaska State Trooper.