Napoleon Dynamite.
I'll say what was originally a PM to N64 Chick (IIRC):
When I saw the previews for the movie, I immediately knew I wouldn't like it. When I saw the commercials for it on TV, I still knew I wouldn't like it.
My mother thought it would be a cute movie though. So she dragged my father, my sister, my brother, his girlfriend (at the time), and myself to the movies every so often to try and see it. The first few times my mother tried, it was sold out, which was a huge relief for us, so we either picked another movie or just left and did something else that night.
"Why don't you guys wanna see it?" My mother usually asked.
"Because it's about a LOSER." Was my brother's reply. And I agreed.
"It looks pretty stupid" was his girlfriend's reply.
Then finally came a night when the movie wasn't sold out. We dreaded walking into the theater, where it had already started with the opening credits. I sat next to my father, who also shared my sentiments. It was EXACTLY how I thought it was going to be. Terrible.
Every 20 minutes or so my father and I would comment about how bad it was. I did not laugh once. My father also was easily able to keep a straight face, as were my brother and his girlfriend. My brother and his girlfriend would also turn around in their seats and comment with us how stupid the movie was.
2 hours of my life, wasted.
When we left the theater, we all said to mom that if she wants to see a movie like that again, she can just go by herself.
I really hate terrible movies.