Not movies that are disturbing, per se, as I find those to be few and far between, but more just movies that are really, really fucked up.

Here are a couple:
Bitter Moon
Oldboy
Haute Tension
Fargo
Thriller: A Cruel Picture
The Deer Hunter

Killing Zoe

Not to over hype it for you, but seriously, I Spit on Your Grave:

Pretty much any Cat. 3 Hong Kong movie. Red to Kill and The Ebola Syndrome jump out.

Lots of Miike stuff, but especially Visitor Q. What a bizarre film.

Bloodsucking Freaks is another one that is really fucked up (although it's also terrible).

Very bad Things

I love this movie. My best friend and I have a life long promise that whenever one of us got married, the bachelor party would be similar in tone to the one in the movie.

I've made it pretty clear that I am NOT going to be the one who accidently murders a hooker.

This sounds fairly interesting, I should probably check it out. Don't we have threads like this like every month though? Anyway, I choose off the top of my head:

Weekend
Cannibal Holocaust
Irreversible
Ebola Syndrome
Visitor Q

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Visitor Q is by far the most seriously f-ed thing I've seen. Ebola Syndrome second.

yea, some of the scenes in high tension were fucked man.

I thought the ending turned the whole thing into one big mess of twisted love and desperation. Fucked up to the extreme.

That said, most of the violence made me giggle. And got me excited. VERY excited.

I'll also add The Pianist. There were some REALLY fucked up scenes in that movie.

Boogie Nights.

There's this play called Bent about homosexuals in a concentration camp. I've never seen the movie version, but if it has all the stuff from the play, it's probably really fucked up.

Also, the movie version of 1984 with John Hurt.

Agree with Visitor Q. Also from Miike: Gozu!

I also thought The Devil's Rejects was pretty fucked up.

Also, Night and Fog

I spit on your grave has to be one of the worst movies I've ever seen.... from the girl getting raped by a retard, to the "John Wayne Bobbit" killing of the guy in the tub, the entire movie was just a waste of time! Not that I give ANY credit to Roger Ebert, but he deemed this "a vile bag of garbage...without a shred of artistic distinction." If you want to see a good movie concerning rape/revenge watch "Straw Dogs"

I dont watch as many fucked up movies as compared to some of you all, but one that really pops in my head is Clockwork Orange.

Seeing that as a kid really freaked me out, and it gives me chills anytime I think back to it.

Never said it was a good movie, but we're looking for f-ed up ones here. If that's not a fucked up movie, I don't know what is.

Natural Born Killers

i watched this on lsd one time........ I never wanna see it again

That looks interesting.