A derogatory term used in the US Air Force referring to the enlisted personnel. Used mainly between Airmen in the same capacity racial slurs are used amongst members of their respective races. Rarely used by officers, as calling enlisted people 'sweaties' usually results in either mutiny or an anonymous ass kicking, and always indicates that the officer in question is a total prick.
Officer: "Now the way I see it, I am the boss, and you all are the Sweaties. I run a tight ship around here, and I expect y'all to be good little Sweaties for me... starting with the shitters, cause they need cleaning."
Airmen, whispering to each other: "What an asshole."