Episode: 'Douche and Turd', season 8

Why it's so naughty: When Stan refuses to vote in a school election, Diddy literally threatens to kill him — a spoof of Diddy's "Vote or Die" campaign to encourage young people to vote in the 2004 US presidential election.

Quote: "Democracy is founded on one simple rule/get out there and vote or I will motherf*ckin' kill you!"