Error returned when a server cannot find the requested page.

Once upon a midnight dreary, while I websurfed, weak and weary,

Over many a strange and spurious website of 'hot chicks galore',

While I clicked my fav'rite bookmark, suddenly there came a warning,

And my heart was filled with mourning, mourning for my dear amour.

"'Tis not possible," I muttered, "give me back my cheap hardcore!"

Quoth the server, "404".

You are seeing this definition because Urban Dictionary thought it would be a good idea to make this their 404 page!

I got the 404 error also!

Sorry, this definition could not be found.

What's up with this new character limit thing, anyway? It pisses me off.

Someone who's clueless. From the World Wide Web error message "404 Not Found," meaning that the requested document could not be located.

"Don't bother asking him... he's 404, man."

Area code for those inside the Atlanta city limits; Person living "inside the perimeter," as it were, as opposed to 770, the metro area code, for the suburbs... Also a term of pride tossed about casually when representin' the ATL.

Is she 404 or 770?
404, A-Town all da way.

(v.i.) Out to lunch; not having it together; acting in a stupid way. Typically derogatory.

Derivation: the "404: Not Found" error encountered when surfing the web.

That luser's 404!

Today in class, Hsu was 404.

The Error, Which A Server Gives You When The Requested Page Is Unavailable Or Doesn't Exist:
Basically A Broken Link as Such...

Once upon a midnight Dreary,
While I Websurfed Weak And Weary,

Over many a strange & tempting
Website of "Chicks Galore"
Oh So so very Exempting
To take the sites "Free tour"

Of a Sudden, without warning,
Was my heart then filled with mourning,

Mourning for my dear amor,
"Tis' not possible, " i muttered,
"Give me back my cheap hardcore."
But my monitor not cluttered,
Quoth the server "404."