I absolutely love this movie its so hilarious. Its about one of the characters Doug and he is going to get married so he takes his 2 friends Stu and phil and his soon to be brother in-law Alan who is the main reason why this movie is so good.

They have a big night out and cant find the groom Doug and latter find out that Alan gave them drugs on the night. They then find out the things that they got up to on the night and attempt to find Doug.

This is probably my favorite quotes of all time (im only saying this off the top of my head but still)
Alan: "You guys might not know this, but I consider myself a bit of a loner. I tend to think of myself as a one-man wolf pack. But when my sister brought Doug home, I knew he was one of my own. And my wolf pack... it grew by one. So there... there were two of us in the wolf pack... I was alone first in the pack, and then Doug joined in later. And six months ago, when Doug introduced me to you guys, I thought, "Wait a second, could it be?" And now I know for sure, I just added two more guys to my wolf pack. Four of us wolves, running around the desert together, in Las Vegas, looking for strippers and cocaine."