When I was in the Army all those years ago, I was interested in the slang – and how it is created. It seemed that the slang – and phrases – used in the military comes from wars current and past.
First day in the Army I learned you don’t address a sergeant as “Sir”. He (and now she), will tell you “Don’t call me sir! I work for a living!” Going back to the world referred to the states by a Vietnam soldier, and a yearning to return. Beaucoup – meaning “a lot” – was in the daily Army slang. That came from the French, of course, by way of Vietnam. “Short” referred to a soldier who would either leave the Army soon, or leave Vietnam.
One of the last things my Dad told me – laying in the hospital bed a day or 2 before he died, was tell me they used to call the bedpans “Ducks“, because they looked like a duck.
Anyway, here’s some words that came from WW1. Some of which you use to this day.