Stand up comedians try to make us laugh by emphasizing clichés or taboos and saying a lot of fuck or shit while they're at it. Dave Chapelle is the prime example of this. His favorite topic? Interracial differences. His best known quote? "I'm rich bitch!". How did he get rich? He's currently the most popular comedian in the United States, he has/had his own TV show for 3 seasons and earns enough money this way to comfortably decline 50 million dollar contract deals.

 His best show is called "For What It's Worth", taped in 2004. The show is about 1 hour with pure quality comedy. Even though there's so much vulgarity, this show does have a hint of political activism in it. Here's a clip from "For What It's Worth" where he talks about public transportation (5 minutes):

Some other clips: 

• Where does aids come from (2 minutes
• How old is 15? (6 minutes)
• Grape drink (3 minutes)