Royal Marines Slang and Sayings used from the Second World War to the present day. All Military Services around the world develop their own choice of words while training their recruits, something that is unique to just them. A tradition that goes back many years, but still goes on to this day. In fact, it could be said that a military minded person could usually work out where they are just by hearing them speak. The Royal Marines are no exception, and what follows is just a small selection of words that may help you next time you're talking to a Royal Marine.