Somewhat outdated but still relevant, George Carlin’s 7 words you can’t say on television.
https://www.youtube.com/watch?v=FMkNsMMvrqk
JEDIT: I was thinking of the original bit, which is this one.
http://genius.com/George-carlin-the-seven-words-you-can-never-say-on-television-annotated
But I can’t find it on youtube for some reason.