Zombiefied means when game/series/etc a game is revived when it was dead/underrated but also the fandom turns extremely obnoxious and terrible
Person 1: Man have you seen this cool game/series?
Person 2: Yeah, I used to enjoy it when it was kinda dead, but now, it has been zombified with this new fandom
Recklessly posting memes that violates rules in a discord server, such as in posting NSFW, or Politically Incorrect memes.
Person 1: Did you see that moron that just kept posting memes that violated the rules on our server despite us asking for him to stop ?
Person 2: Yeah, he was Going Postal on Memes.