Zombie Ass: Toilet of the Dead (ゾンビアス, Zonbiasu) is a 2011 Japanese comedy horror film directed by Noboru Iguchi and written by Iguchi, Ao Murata and Jun Tsugita from a story by Tadayoshi Kubo.

It had its world premiere at Fantastic Fest film festival in Austin, Texas in September 2011,[1][2][3][4][5] and was theatrically released in Japan in February 2012.

[5] Wracked with guilt over the suicide of her bullied sister, young karate student Megumi accompanies four older friends on a trip into the woods: smart girl Aya, her druggie boyfriend Také, full-figured model Maki, and nerdy Naoi.

Things start to go badly when Maki finds a parasitical worm inside a fish – and eats it down, in the hope that it will keep her skinny.

The parasitic worm she ate had apparently laid eggs in her stomach and came out of her in her diarrhea attack.