I can't believe no one has mentioned Colum Sands song in this thread!
'Whatever You Say, Say Nothing'

Whatever you say, say nothing, when you talk about you know what
For if you know who can hear you, you know what you'd get
For they'd take you off to you know where
For you wouldn't know how long
So for you know who's sake
Don't let anyone hear you singing this song

That's only the first verse. Someone else might like to post the rest?!!! Please... I'm really tired and I've a cold coming on... in short, I want to do nothing for a while.........(sigh)