103: Early Hints
206: Partial Content
409: Conflict
412: Precondition Failed
417: Expectation Failed
418: I'm a teapot
420: Enhance Your Calm
421: Misdirected Request
424: Failed Dependency
451: Unavailable For Legal Reasons
530: Site is frozen
A 1950s film noir in HTTP status codes
@cypnk Quick! Someone make a book/movie with those as chapter titles!
@cypnk Would make a great idea for NaNoWriMo.
@cypnk Looks like it's been done before: https://www.mcsweeneys.net/articles/a-love-story-in-status-codes
@siraben Ooh, I had no idea. That's actually a clever version
@cypnk I learned about and implemented code around 409 (Conflict) today. :)
974: Site is in Chinatown
@cypnk WTF teapot real sortof
thanks!
error 418 server refuses to brew coffee, says I'm A Teapot!
ref. 1998 April Fools Joke
Will be saying "I'm A Teapot" to all requests next week...
@cypnk I like 420 and 451
Server run by the main developers of the project 
It is not focused on any particular niche interest - everyone is welcome as long as you follow our code of conduct!
@cypnk I can't think of a single noir film that has tea in it. Alcohol, yes