Zombie Simpsons: https://deadhomersociety.com/zombiesimpsons/zs1/

I only heard the term recently, from this video: https://youtu.be/hi_fxwLBSFo

But I was watching the show from the beginning and was there for the seasons where it went off the rails and generally stopped watching around season 9-10, and the random episodes I caught after that were unmemorable to say the least.