This is a fascinating short explanation of some English phrases that came from falconry by Great Big Story. It's easy to forget how trades, sports, and other activities affect language.
English has so many idioms and I'm always happy when reading SF and aliens call humans out for using expressions that don't make sense or for explanations of strange saying. But I don't think I've ever read a fantasy novel where language was evolving or where the expression is only used in one trade (or class) and someone had to explain it. Which is interesting as most jobs today have specialized vocabulary that outsiders won't necessarily get. When I started working at the bookstore I had to learn 'shrink', 'shelf-talker', 'remainders', 'end cap', etc. meant in this context (or meant at all). Similarly, back when I was a trade show exhibitor, I learned 'pitch', 'draw tip', and several other terms specific to that job.