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Gregory (from left), Wendy, Cartman, Stan and Dyle in Trey Parker's "South Park: Bigger, Longer and Uncut."

The world according to Trey Parker and Matt Stone is an outrageous place. The two smart alecks met in film school in Colorado and have been chums ever since. Though both men are now in their 40s, they make their living by mocking the adult world with the mischievous glee of fourth-graders and perhaps they always will. Here are five gems from their sick and twisted body of work.

"South Park" (1997 to present)

"Going down to South Park, gonna have myself a time." The pee-your-pants-funny antics of a gaggle of Colorado grade schoolers have kept the world chuckling, and squirming, for the past 15 years in this iconic Comedy Central sitcom. One of the rare animated series to appeal to adults as much, or maybe more, than it does to kids (who aren't allowed to watch but usually do anyway).

"The Book of Mormon" (2011)

Stone and Parker poke fun at Broadway, Mormonism and other religions in this rambunctiously raunchy Tony-winning megahit musical that instantly earned them a spot in the Broadway pantheon.

"Team America: World Police" (2004)

Stone and Parker take on the politics of war in this zany satire of U.S. foreign policy. The movie takes swipes at the concept of the U.S. trying to "police" a chaotic world and mocks the heck out of conventional action movie tropes.

"South Park: Bigger Longer & Uncut" (1999)

When the boys see an R-rated movie about flatulent Canadians Terrance and Phillip, their parents pressure the United States to wage war against Canada, eh? It's a critically acclaimed full-length animated movie that hinted at the duo's affinity for musical numbers.

"Cannibal! The Musical" (1993)

One of Stone and Parker's first collaborations, this is a wonderfully schlocky movie musical about the grisly life of Alfred "Alferd" Packer, a prospector who set off on an arduous journey from Utah to Colorado during the winter of 1873 that left the rest of his party dead and eaten. Parker stars in the sordid gem and Stone plays some supporting roles. Imagine the Donner Party with jazz hands.