just to start you off; it may take mye a while to get the rest of the lyrics and problably someone else will fill you in further before I do.

Whatever you say, say nothing
When you talk about you know what
For if you know who should hear you, you know what you'll get!
They'll take you away 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.