8. Stepbrothers (2008)
This is not only one of the funniest movies of the past decade, its Will Ferrell's funniest movie. Which is saying something. Anchorman was a tour-de-force, showcasing not only Ferrell's comedic prowess but also a great ensemble cast including Paul Rudd, Steve Carell, David Koechner, Chris Parnell, Christina Applegate and more. That movie is pee your pants funny, but this movie is even funnier. This is poop your pants funny. The equally hilarious John C. Reilly comes in with more than an assist, Ferrell and he share the spotlight, and their back and forth idiocy is up there with the all time great comedy duos. This is a laugh riot! Sorry, I just wanted to sound like Bill Diehl for a second. This movie is hilarious from the beginning straight through the end. There is no lag time. It hits the ground running and just increases speed. The dialog is so good, you will catch hilarious lines that you missed from laughing hard at the line right before it. I think I've seen this movie 9 or 10 times, and I catch little, hilarious throw away lines every time I watch it. Reilly and Ferrell are masters of taking a concept and pushing it as far as it will go, catching the energy of improvisation and applying it to the scene and maximizing the comedic potential. This is one of my favorite movies of the oughts (obviously, its on my top 10), I can't recommend it enough. Beware, however, you may poop your pants and drool all over yourself from laughing so hard.