Peanuts: Bigger, Longer, and Uncut

 is a 1999 American adult animated musical comedy film based on the Fox animated television series Peanuts, which, in fact is based on the comic strip by Charles M. Schultz. The film was directed by series creator Trey Parker and stars the regular television cast of John Kricfalusi, Parker, Matt Stone, Mary Kay Bergman, Clancy Brown, Doug Lawrence and Isaac Hayes, with guest performances by George Clooney, Eric Idle and Mike Judge. 20th Century Fox handled U.S. and Canada distribution, while Warner Bros. Pictures handled international distribution. The film follows Snoopy, Charlie, Sally, Linus and Lucy as they sneak into an R-rated film featuring Canadian actors Terrance and Phillip and begin cursing incessantly. Eventually, their mothers pressure the United States to wage war against Canada for allegedly corrupting their children, giving Snoopy and the kids no choice but to rescue Terrance and Phillip themselves while Kenny McCormick (in his first major role) tries to stop a prophecy when Plankton, Satan and Saddam Hussein conquer the world.

The film tackles issues of censorship and bad parenting, and parodies the animated films of the Disney Renaissance as well as musicals such as the West End's Les Misérables, and satirizes the controversy surrounding the show itself. The film also heavily lampoons the Motion Picture Association of America; Parker and Stone battled the MPAA throughout the production process and the film received an R rating just two weeks prior to its release. A writing team consisting of Parker, Stone, and Pam Brady was assembled. They conceived numerous plot ideas, with Parker and Stone's being the one developed into a film. The film features twelve original songs by Parker and Marc Shaiman, with additional lyrics by Stone.

The film was released in theaters on June 30, 1999 and on home video on November 23, 1999 and received positive reviews from critics. Produced on a $21 million budget, it went on to gross $83.1 million worldwide, making it the highest-grossing R-rated animated film of all time, until it was surpassed by Sausage Party in 2016. The song "Blame Canada" earned Parker and Shaiman a nomination for Academy Award for Best Original Song at the 72nd Academy Awards.