12 Controversial Comedians: Daniel Tosh, Kathy Griffin, Ricky Gervais
Barbara DeFranco / July 12, 2012
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12 Controversial Comedians: George Carlin
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Another milestone comedian for free speech, George Carlin, coined in the 1970s what he called the term "seven dirty words" -- the legal standard for what can and can't be said on TV. "They're just words!" Carlin famously said.