Kuzmichi - unregistered users

Even in everyday life, when speaking about resources requiring registration, one has to use the phrase “unregistered user”. And if you are a site developer, you have to pronounce this phrase a bunch of times a day - “close it for unregistered users” or “not to show unregistered users”. Love is very long and inconvenient to pronounce, so I decided to think of calling unregistered users Kuzmichi and taught my colleagues)

I remember this word from Spartak fans from “Guest explosives”. So they call the authors are not very keen on football and the club or something like that. So I remembered this word when the language was tired of unscrewing the “unregistered user” for the hundredth time, and colleagues quickly got used to it, because so much more convenient.

Understanding within the office is nice. But it would be better if all people called this concept the same, equally short. Therefore, I offer you to adopt the word Kuzmichi in the meaning of "unregistered user". One has only to start, and the jargon spreads around the world very quickly.

How do you like that? Or maybe there are already other options that I do not know about.
And what is called "unregistered users" in your office?