I still say it doesn't get any worse than Entrapment. It lures you in with Sean Connery and Ving Raimes and the hope of some Catherine Zeta Jones booby, plus what seems to be a great story about a thief who uses stealth and all kinds of cool gadgets to steal stuff that's under super high security. And with all that expectation, you go see the movie and feel like you were just the butt of a horrible joke gone wrong. Then, after vomiting up your expensive popcorn and soda, you vow to never again be drawn into a movie that stars Sean Connery and a young woman, and that you now hate Catherine Zeta Jones so much that you don't even wanna see her nekkid.
Dumb and Dumberer, on the other hand, pretty much spells out that it's going to suck from the get go. You go in with no expectations, and if you even get a chuckle out of it, you're ahead of the game. I'll give it a watch though, because I'm a movie masochist, and to see if I'm wrong.
SOB