Poop Will Tear Us Apart is a film series that features a monster which travels through the sewers and emerges from toilets to attack people. It appears as a giant log of poop that can grow arms and legs - it can even blind its prey with Hershey squirts, something it often does before bludgeoning them to death with its own solid stool limbs.

Done entirely in the 80s slasher genre, it features an 80s soundtrack that, naturally, has Joy Division's "Love Will Tear Us Apart" as the feature track.

Perfect for the sequels:

Poop Will Tear Us Apart... Again.
Poop Will Tear Us Apart ... Again II
Poop Will Keep Tearing Us Apart Forever
I Know That Poop Tore You Apart Last Summer
Poop Vs. Jason: Who Will Tear Us Apart?
Poop Terror On Elm Street
The Poopyville Horror
The Poop Witch Project

Etc.