If you post in a thread that had its last comment several days or more ago before your new comment then you “revived” a dead thread that should have been left alone as the topic is already over.
Since someone “revived” a “dead” thread another forum user made an image of a card like it is from the card game “Magic The Gathering” and called that card “Necropost” or so as a combination of “Necromancy” (for “reviving the dead”) and “post” (as in a making a post / comment in a thread).
Then that image was used to reply to such a late comment that “revived a dead thread”.
Ever since then such comments “reviving dead” threads have been known as “necroposts”.
This is the image I am talking about:
This can be found quite often in the forum.
Who wants this account? I don’t use it no more?