A catchy if not condescending term used to describe the genre of movies in which people are tortured and killed, like the Saw
series. The phrase of course implies that those who enjoy the movies have a fetish for such things and get their rocks off watching someone being tortured.
Unfortunately this completely ignores the strengths of these movies. Saw really does have an interesting philosophical aspect, really. The story is also pretty good. The guy above said Hostel actually is just plain ol' torture, I would agree there.