Error 404 (Not Found)!!1 

Head/Title message of Google's (and their own services such as YT, Gmail, Blogger, Gstatic, Google Photos) 404 page.
!!1 = They piss off at you.
To piss them off more, search any of their sneaky stuff they intend to hide (like Sundar Pichai getting testified, him bending his knees to CCP, Susan Wojcicki banning of anti-CCP wordings, Google's company secret leaked by some conservative media) after leaving the page. Google's tracker will start to slowly shadowban you at this point.

Error 404 (Not Found)!!1 The requested URL / was not found on this server. That’s all we know.

Error 404 (Not Found)!!1 by Shiine-1 May 2, 2022

error 405 

An error similar to Error 404 but one step higher. The equivalent of your web browser saying "Fuck not given"

Guy1: So I went to take an exam the morning after my girlfriend broke up with me. When I looked at the exam I suddenly encountered Error405.

Guy2: Dude that sucks.

Dude: I tried to download that video you told me about and my computer gave me an error 405
Dude2: dude your computer doesn't give a fuck

error 405 by Squishy-phil October 19, 2011

Error 220 

The error that occurs (at least in Europe) when you connect the expansion bus on a computer directly to the power line. May result in some light phenomenons. US readers may be more familiar with the similar Error 110.

(not applicable)

Error 220 by Anders Carlsson January 16, 2004

Error out

Where the thought process of an individual becomes difficult and they may not be able to formulate words or sentences, thus becoming confused about their surroundings. Error out is usually used as a negative term as the individual may become distressed when experiencing this state of mind. Error out will occur in the human body when there is a large consumption of alcohol or narcotics been taken.
Word is derived from the terminology used for computers when there is a malfunction after rebooting.

Boy 1: Man, did you see Mike last weekend? He looked really bad, i think he smoked too much weed.

Boy 2: Yeah, i know, it was a real error out...He was just lying there, it was pretty funny!

Boy 1: Haha, i always error out when i smoke too much!

Error out by Ursypursy October 30, 2011

error 503 connection timed out 

what happens when urban dictionary times out

error 503 connection timed out
guy: darn, urban dictionary timed out, now I'll never know what parswadim means

error 503 connection timed out by icanttype May 4, 2018

Error 404 

Definition not found.

Error 404, definition could not be found

Error 404 by xXButtseXx January 9, 2015

{"error":"An error occurred."}

Secret message you can get in urban dictionary.

Dave: Did you hear about the secret message you can get at urbandictionary.com?
Dan: No I didn't.
Dave: The message says {"error":"An error occurred."}

{"error":"An error occurred."} by pusljivac September 25, 2022