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Robert Louis Stevenson, the famous author, had displayed the feeling of seeing 404 in his book 'Treasure Island' in the chapter 'The Black Spot'. If you encounter the vicious 404, you will die of shock or worse, you will die of force when you smash the computer on your forehead. No one has come back from a scouting mission with 404, but it is said that a hero called Elon would save the day and slay 404. But that time hasn't come yet, and 404 is still criminally active. Hopefully, he will die from the new disease, Ligma. (you thought I wouldn't put a Ligma joke in this definition, didn't you?)
You: "He is a big supporter you You-Know-Who!"
Harry Potter: "What? 404?"
You: "Don't speak his name!"
404 by Did I Get Top Definition? November 9, 2018
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404 can mean a Roland SP-404. Roland SP-404 is a famous sampler used a lot by beatmakers and DJs. Also you can hear variation like "four-o-four", "404SX", "404OG". 404-SX is a newer version of original 404. Original 404 can be named like "Roland SP-404OG".
-hey, check this beat i made with 404 tonight!
-i brought 404 on my live in the club
-no man, i don't need SX, i looking for 404OG actually.
-look at this four-o-four guy i bought today
404 by AK-48 February 5, 2019
Checking out a hot girl only to find she is flat-chested.

404 is the response code given by servers on the Internet when a requested page is not found. In the usage of this expression, it is tits not found.
Dude 1: Did you see the new intern chick?
Dude 2: Yea, she's hot ... but got a 404 when I took a closer look.
404 by bro-master-of-arms June 12, 2019
Not found, especially of a web page on the Internet.
Bill was 404 all morning.
404 by Delbosco October 10, 2021
404 is the name given to dog meat in the cross river area of Nigeria
Where can I buy 404 around this area
404 by Legendaryghosthater February 14, 2025
The number 404 refers to HTTP error code (404) that is returned by the server, when URL user asked for couldn't be found ("Not Found"). In joking or metaphorical manner it is used as a synonym of "not found", "unavailable", "non existent" and so on.
404 by HaxoTF March 4, 2026