Jargon is one of the joys of our language. Lawyers have their own jargon; so do doctors and engineers. Those are professional, somewhat formal examples of domains with their own jargon, but you can create your own! Among a select group of people, you can create jargon, or your secret code, that only people in your club understand. We all do this all the time. You probably know of some word usage that only your family understands.