denial of service

"Denial of Service" is a type of attack against computer systems that makes a server become unresponsive to any user requests. This is most commonly performed by flooding the server with huge amounts of senseless requests so that the server gets busy computing all those requests.
Normally, a denial of service attack does not compromise the server's security.

The "Anonymous" Hacker group recently started a denial of service attack on paypal so that no one was able to buy stuff via paypal for hours.

denial of service by 4006 June 14, 2011

Distributed Denial of Service 

If you say this entire phrase out loud, either you are a nobody, because nobody ever says the entire phrase, or you are explaining DDoS to a n00b.

See DDoS and Make Love Not Spam for examples.

Distributed Denial of Service by Downstrike December 1, 2004

Dedicated Denial of Service 

Where a girl is being railed by 3 guys at once and they all cum in sequence, and she can't clean up all of it and gets pregnant.

Yeah me and my guys were railing this girl last night, gave her a Dedicated Denial of Service, shit was lit bro.

Dedicated Denial of Service by notcommiesquirrel January 11, 2021

Social Network Denial-of-Service 

When a website ends up denied (saturated with external communications requests, such that it cannot respond to legitimate traffic, or responds so slowly as to be rendered effectively unavailable) due to a sudden enormous spike in popularity.

A Social Network Denial-of-Service (SNDoS) could be started by one Facebook user setting his/her wall status to: "Go to urbandictionary.com, type in your first name, copy and paste this as your status and the First entry for your name under comments"

Social Network Denial-of-Service by Nettie-AZM February 3, 2010