Baby Reindeer. Not a movie, 7 episodes, but one of the more fucked up things I've seen in a while.

The Hills Have Eyes

The Skin I Live In, Antonio Banderas, he's a surgeon and it seems there's a woman trapped in his house?

Also, basically any Haneke movie, Funny Game, Benny's Video, L'Amour.

The Room, easily.

Oh hi Mark!

Cube

Edit: Apparently there's a remake so I should precise that it's the movie from 1997.

Can't remember the movie but it had someone get kidnapped by a group of cannibals or something and they kept them alive while chopping body parts of and cauterizing the wound, eating them slowly over time to keep them fresh. Don't think I was able to finish it.

Brazil. That's one fucked up movie.

I saw Baise Moi (Kiss/Rape Me) in a theatre just before it was banned. I was not expecting that

This is about the same time that Kids, Gummo, Happiness, and the Brown Bunny were all released.

Each film is fucked up for its own reasons. Though, I understand, Salo and A Serbian Film are next level fucked up.

Compliance stands out to me as something I watched and vowed never to watch again.

I struggle with those kind of themes. Anything involving rape or sexual violence.

obviously not a fucked up film, but Priscilla Queen of the Desert has one scene involving gay bashing makes the film too hard to sit through for me.

Ohh, I can give you a list to the most disturbing movies I ever watched, its 100 movies. But to answer your question I can say it's "A Serbian Film" from 2010, "Martyrs" from 2008. Worth to mention "Irreversible" from 2002

Hard to say. Depends on what your definition is. "Possum" is up there, as is "Skinamarink". But those are both a pretty specific type of disturbing. Not necessarily scary, but disturbing depending on life experiences.

I just watched "Men" last weekend, knowing nothing going in. That was a bit of a strange one.

Sure, there's Martyrs, antichrist, requiem for a dream, Mother!, hereditary, the killing of a sacred deer, etc. but the first 2 I mentioned hit a bit harder than those others.

Side note: seeing some I haven't seen here. Got me some watching to do.

Gummo?

Lobster

Antichrist broke me

One that wasn't mentioned here is Enter the Void. The opening credits soften you up for a trippy voyage.

This video on motherless of a guy stuffing black soldier fly magots into his pp hole. But if you're looking for something that played in the cinema, human centipede 2 is a strong contender.

"Scream and Scream Again", 1970.

Our parents dropped us off at the theater to see something else, like "The Love Bug", but it had moved on and we randomly ended up seeing this horrifying film.

We were not ready for dismemberment and dissolving bodies in vats of acid...

Martyrs!

‘Meet the Feebles’ is up there.

I know there are some obscure arthouse/avant garde films that I’ve forgotten that would qualify.

Must Lucio Fulci movies.

I have a much more lighthearted answer.

This post contains some spoilers, but I consider it outside the statute of limitations for such things.

There's this old movie where aliens are concerned about humanity developing a weapon that if used would Destroy the universe.

So the aliens use a really stupid plan to try and convince us to stop. And I guess this was after 8 other ideas either failed or were considered even worse.

Anyway at the end (of course) humanity wins and drives off the aliens. Wait, what was the aliens' original goal? Something about the universe? Oh well, must not be important... The End.

And that was Plan 9 from Outer Space.

For me, it's a 3 way tie between Tusk, Teeth, and Boxing Helena

Human Centipede,
that shit is banned in a few countries for a reason..

ichi the killer. couldn't make it past the first few minutes