
Carlin, who had a history of heart and drug-dependency problems, was most widely known for his routine called "Seven Words You Can Never Say On Television." A regulatory battle over a radio broadcast of the performance ultimately reached the U.S. Supreme Court.
In the 1978 case, Federal Communications Commission vs. Pacifica Foundation, the top U.S. court ruled that the words cited in Carlin's routine were indecent, and that the government's broadcast regulator could ban them from being aired at times when children might be listening.
The Grammy-winning Carlin remained an active presence on the comedy circuit. Carlin was scheduled to receive the John F. Kennedy Center's prestigious Mark Twain Prize for American Humor in November and his publicist said Carlin performed in Las Vegas this month.
His comedic sensibility revolved around a central theme: humanity is a cursed, doomed species.

Drug addiction plagued him for much of his life, beginning with marijuana experimentation as a teen, graduating to cocaine in the 1970s, and then to prescription painkillers and wine. During the cocaine years, Carlin ignored his finances and ended up owing about $3 million in back taxes. In 2004, he entered a Los Angeles rehab clinic for his alcohol and Vicodin abuse.
George Dennis Carlin was born on May 12, 1937, in New York City. After a brief, troubled stint in the U.S. Air Force, he started honing his comic act, developing such characters as Al Sleet, a "hippie-dippie weatherman."
Carlin told Playboy that his sensibilities developed in the 1950s, "when comedy stopped being safe ... (and) became about saying no to authority." He cited such influences as Lenny Bruce, Mort Sahl, Dick Gregory and Bob Newhart.
Carlin is survived by his second wife Sally Wade; daughter Kelly Carlin McCall; and brother Patrick. His first wife, Brenda, died of cancer in 1997. Reuters