Duncan (Ken Marino) is chased by some mysterious horror. Then it flashes back 123 hours. He is in the doctor's office with his wife Sarah (Gillian Jacobs) with a polyp in his colon. He hates his job and his boss Phil (Patrick Warburton) is making him fire people. He has a new therapist Highsmith (Peter Stormare). His mother Beatrice (Mary Kay Place) brings her boyfriend Bobbi (Kumail Nanjiani) and a fertility doctor to dinner. He poops out a monster which kills everyone who causes him stress. He bonds with it naming it Milo.
It has some minor funny moments. Milo himself generates very few laughs. It's a little gross and very perplexing monster. I think the scene coming out in front of the therapist needs to show their connectivity more. Milo can get hurt and Duncan can get hurt in sympathy in that scene. The horror part of the movie isn't that scary. The comedy has a few good scenes. It's a B-movie that is slightly better than a butt monster ought to be.
