What is "pointless thread necromancy?"

[Starman]

Had a post deleted for "pointless thread necromancy", but don't have a clue what that term means. Could I get a formal definition so that I don't engage in this sort of behavior again in the future?

 

[JayPettryMMA]

Had a post deleted for "pointless thread necromancy", but don't have a clue what that term means. Could I get a formal definition so that I don't engage in this sort of behavior again in the future?

Some of our staff members have quite a way with words. Necro bumping, that is, posting in threads that are inactive for a long time, is frowned upon when the intent is to troll or flame people (such as calling someone "subhuman trash"). Your post was removed among several in a 2018 news story thread that was locked when the thread was bumped, and immediately devolved into flaming, slurs and other things.

 

[GordoBarraBJJ]

What is this necromancy?