,ästhetisch minderwertige und moralisch anstößige geschichten in heft oder buchform´ pulp, american heritage dict.

Error Code: 404 Not Found

Something must have went totally wrong...

rfc-editor: 404 Not Found part of: RFC 9110 - Section 15.5 Client Error 4xx, 5., Fielding, et al.

The 404 (Not Found) status code indicates that the origin server did not find a current representation for the target resource or is not willing to disclose that one exists.
A 404 status code does not indicate whether this lack of representation is temporary or permanent; the 410 (Gone) status code is preferred over 404 if the origin server knows, presumably through some configurable means, that the condition is likely to be permanent.

A 404 response is heuristically cacheable; i.e., unless otherwise indicated by the method definition or explicit cache controls (see Section 4.2.2 of [CACHING]).