HTTP disease
A very rare disease (there are no known cases of it) where you involuntarily say something similar to "404 page not found" upon encountering a situation you are not prepared for.
Person 1: Hello, I have HTTP disease.
Person 2: I don’t believe you and I now hate you for lying!
Person 1: 404 page not found.
Person 2: I don’t believe you and I now hate you for lying!
Person 1: 404 page not found.