A stupid movie containing vast amounts of violence that is never actually scary. However, it is referred to as a "horror" movie because of the horrors that are experienced when one returns to their home subsequent to the viewing of the movie.
Examples include the following; various nightmares related to the movie, the unwelcoming of that dark room at the end of the hall, the impression that there is a character from the movie in one's closet/bathroom/shower or other enclosed spaces in or near the bedroom, and other similar experiences.
"Hey Jim, you wanna come over to see a horror movie tonight?"
"Fuck no, not after the last time when I almost shit myself when I got home."
Having sex with a girl who is menstruating - (making a) horror movie
Menstruating lady to lucky man: Hey do you wanna go and make a horror movie?
"Aw man, I romanced with this girl last night and it looked like a scene from a horror movie because she had her period"
Girl: No, not tonight I'm bleeding from my vajay-jay
Boy: That's cool we can play horror movies
"unless you like horror movies you don't want to go down there tonight"