Animal House, Hot Rod, Ted/Ted 2, and A Million Ways to Die in the West.
Pretty much any scene in Animal House that has john Belushi in it is great. The horse prank, food fight("I'm a zit!") and the "Pearl Harbor" speech at the end. But my favorite scene is the part where they go to the female college and pretend to have been dating a girl who had died to hook up with her roomates. That's the funniest thing I've ever seen in a movie, and it makes me sad that given how advanced we are today from back then that I'll never be able to pull that move off.
I think there was a big thread on gaf not too long ago talking about hot rod. That's one of those movies where all the best lines just come out of nowhere. Best scene is samberg dancing in the woods.
I guess I'm the only mcfarlene fan here, I love his humor but I can see where it's not for everyone