“Past practice” and “racketeering” in the legal profession are what’s known as “terms of art.”

Terms of art aren’t limited to the legal profession.

“Squawk”, “deadhead”, “clean”, “dirty” are examples in the pilot profession that mean one thing to the general public but something completely different to a professional aviator.

Anytime I recognize a phrase as being a TOA in the legal world, I shrug my shoulders and wonder what it really means in its narrow context, because I’m not an attorney, and I doubt most here are either.