Stephen: What's cholesterol?
Hugh: It's ... well, you know -
Stephen: Yes, I know perfectly well what it is, but I don't suppose you'd so much as heard of it until a few years ago. You'd die without the stuff.
Hugh: Yes, but too much is bad for you.
Stephen: Well of course too much is bad for you, that's what "too much" means, you blithering twat. If you had too much water it would be bad for you, wouldn't it? "Too much" precisely means that quantity which is excessive, that's what it means. Could you ever say "too much water is good for you"? I mean, if it's too much it's too much. Too much of anything is too much. Obviously. Jesus.
"Doctor Tobacco", A Bit of Fry and Laurie, season 1, episode 4.