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Or its less informative but cuter cousin: https://http.cat/418

Speaking of cute status codes: https://http.dog/418

Ditto, for me 418 has always meant "check response body for the application error code".

I use 418 for “code should not have gotten here” type situations.

It's a weird enough and unique enough error that I pretty much know what is possibly up the moment I see it.

4xx seems more appropriate for sure. I'd say 400, 420, or 429 feel closest.

I always use 418 for anti-botting responses. First because it's hilarious and second because I want them to know that I know what they did heh.

I think somebody also used it as a response when they detected the request to be a CSRF attack?

Ah, yes, the "I'm a teapot" status. Awesome! :-)