shirt
Slang term in the U.S. Air Force in reference to the First Sergeant, also known ad the First Shirt or simply, "The Shirt." Normally a unit commander delegates a lot of authority and responsibility to the Shirt.  As such, most duty, health, morale, and disciplinary issues involving enlisted personnel are handled directly by the Shirt.
Airman Smith, you're scheduled to meet with the Shirt at 1400 on Wednesday.  