What's the worst movie you've ever seen?

Blood Gnome. a movie about a CSI phorographer with a magic camera that lets him see invisible gnomes that are attacking BDSM enthusiasts during sex in an attempt to take over the world. it sounds like it would be funny but it's totally fucking unbearably bad.

Manos: The Hands of Fate, The Room and Hobgoblins are also horrirfic
 
OK:

xXx
10.000 BC

and Highlander part 2 !!!!
This one is so bad, I can't even watch part 1 anymore!!!
 
Most Christmas movies just out and out suck but having been dragged by my girlfriend and her family to see "Four Christmases" was almost unbearable. The fact that Reese Witherspoon hates Kevin Smith just makes me hate her even more.

The Hangover. One of the most annoying movies I've ever seen, except for...

Napoleon Dynamite. Saw this movie on a date, halfway through my date and I looked at each other and, in unison, said "I don't get this movie, do you?" People say it's brilliant but some people also enjoy getting kicked in the balls really hard as well.