Double Nigger

Double Nigger originated on 4chan around 2002-2003. It came about from a thread asking other anons on /b/ "what is more offensive than calling someone a 'nigger'?" To which an anon responded "DOUBLE NIGGER" in all caps. The response was so stupid and juvenile that immediately became a popular meme and was adopted by many on the forum as a means to "one-up" another's insult or to simulate going nuclear to shut down a thread that was de-evolving into a pissing match.

Anon1: Only a retard would play warrior.
Anon 2: Newfags playmages cuz the are no-skill 1-button class.
Anon1: Yeah, well.... DOUBLE NIGGER!