The act of resurrecting a forum thread older than a few weeks. The person (generally a n00b) who does this is referred to as a necromancer.
"Dude, you replied to a thread that's eight months old, the guy hasn't come by since and won't see your reply. Way to necromance."
by Dngrsone May 12, 2005
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The ability of North Korean people to come back to life after reportedly been executed or died due to illness. Named after the DPRK state ideology, Juche, which is translated to "self-reliance".
Person 1: BBC reports that Kim Jong-un has disappeared from the state media and is probably dead.
Person 2: Just give it a few weeks. The power of Juche necromancy will resurrect him.
by portfar September 20, 2021
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Using CGI to apparently raise the dead to appear in games or films.
"Hey, did you know that Oliver Reed was in Gladiator through digital necromancy?"
by Dr Sanguivore June 13, 2009
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When the big comic book publishers continue the life of a character by bringing them back from the dead in order to continue making a profit off the marketing of new stories involving the character and associated character goods.

This is sometimes known as comic book continuity, but Corporate Necromancy is a more expressive word that deals with the bringing of characters back from the dead as a way of rebooting a comic book series to return things back to the status quo.

Manga, or Japanese comics, can also sometimes be accused of Corporate Necromancy when characters die and are brought back, such as with Dragonball and Dragonball Z.

A comics editor who is notorious for bringing commerically successful characters back from the dead in order to exploit their lives financially is called a Corporate Necromancer.
1: Bringing back Aunt May in the Spider-Man comics was sheer Corporate Necromancy!

2: Man, I hate them Corporate Necromancers who brought *insert comics character* back from the dead, leave them alone!
by TeenAuthor June 19, 2008
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When someone revives old meme from death. It has to be at least memorable or back in the day famous meme, because without acknowledging that it was "alive" it can't be revived.
Oh I remember this old meme! It was 12 years ago really famous and somehow it's funny again. Do you do internet necromancy often?
by juicyNeeko June 19, 2020
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