Many forget that Lethal Weapon - the original, when Murtaugh was just barely too old for that you-know-what, was set during the holidays. Which, in conventional estimation, makes it a Christmas movie. Frankly, anything with a dolled up tree, some lights, and a machine gun qualifies as a Christmas movie for this list's purposes. This is the movie that introduced the world to Riggs and Murtaugh (Mel Gibson and Danny Glover), and a franchise with four solid instalments was launched (yes, the fourth one was solid, and Jet Li was a total badass in it). It's a must watch for any guy, so why not check it out again over the holidays.