Zombie Post

On social media, when someone comments on a long dead post from years ago, re-animating the conversation to a horrible, terrifying undeath

April 10, 2013: "My dog has fleas - what do you use that's good?"
April 11, 2013 :lots of answers
April 12, 2018 :"I use Capstar"
April 12, 2018: "Thanks for the zombie post, moron. That dog died two years ago."