Dismemberment, animals, tentacles, that sort of thing?
Or are we talking the REALLY fucked up shit.
People wearing other people's skin, sex with knives, and so on.
Keep in mind, that's just the stuff I can describe that likely won't cause people to vomit onto their keyboards.
DO NOT BROWSE FOR HENTAI EVER.
You WILL be traumatized.
The person below me isn't some dumbass noob.