David Letterman is known for his irreverent sense of humor and cynical, mocking style. David Letterman Best Arguments & Comebacks, Series of David Letterman Best Arguments & Comebacks, David Letterman Best Arguments & Comebacks . The longest-serving late night talk show host in history has had some memorable moments over the years! Join as we count down . David Letterman Best Arguments & Comebacks, Series of David Letterman Best Arguments & Comebacks, David Letterman Best Arguments & Comebacks .
