What does "weird" mean, exactly? The truth is what might seem completely normal to one moviegoer could be completely bizarre to the next. Still, there are some movies out there that are so weird, their weirdness is agreed upon by pretty much everyone who sees them. Here are the five weirdest movies you should see, weirdo.

"The Unknown"

Tod Browning and Lon Chaney were a director-and-actor team known for their journeys into the world of the bizarre. And "The Unknown" is probably their weirdest collaboration, featuring Lon Chaney as an armless knife-thrower who falls in love with a fellow circus performer who can't stand to be touched. The wild plot just gets weirder from there. In addition to being a truly weird movie, it would make an excellent introduction to the world of silent film.

"The Cat's-Paw"

Harold Lloyd's 1930s talkie may seem like a garden-variety Capra-esque romantic comedy, featuring a naive missionary raised in China and sent to America to find a wife. And for the most part it is (albeit an excellently-crafted and hilarious one). But in one bizarre sequence, made all the weirder because of the normal movie surrounding it, Lloyd brings a Chinese style of justice to political corruption in his town. Yeah, there are decapitations involved. Imagine if in the middle of "Mr. Smith Goes to Washington" Jimmy Stewart started chopping people's heads off and you have a pretty good idea of why this is such a weird movie.

"Casino Royale"

No, not the Daniel Craig version. The 60s were a great time for weird movies, with even big Hollywood studios taking part in truly strange films. This would be one of them, a James Bond spoof that manages to be both completely bizarre and kind of funny. The plot is too convoluted to relay properly, but suffice it to say that Woody Allen is the bad guy and seemingly every other actor in the movie is James Bond. Except Orson Welles, who's there to do magic tricks.

"Dr. Goldfoot and the Girl Bombs"

Like we said, the 60s were a weird time for great movies (strike that, reverse it). And this is one of the weirdest. Dr. Goldfoot is a diabolical supervillain played by Vincent Price who invents these beauties called girl bombs who look like girls but who are actually bombs. Acclaimed Italian genre filmmaker Mario Bava directs with true visual gusto, bringing the movie into the world of slapstick comedy with minimal fuss.

"Sympathy for Mr. Vengeance"

Not all weird movies make their weirdness immediately obvious. "Sympathy for Mr. Vengeance" might not seem that weird at all, especially if you're familiar with movies from Korea. But the twists and turns of the plot, about a deaf young man trying to raise enough money for his sister's life-saving kidney operation, goes so far into the Korean underworld that it emerges from the other end. Dark, violent, and weird: The three magic words of Korean cinema.