My favourite has got to be Tom Lehrer's one that goes;

Christmas time is here by golly
Disaproval would be folly
Deck the halls with hunks of holly
Fill the cup and don't say when

What is it called, anyone know?
BTW Firecat, you can't possibly be Wednesday, You aren't nearly unpleasant, vicious or gory enough.....that, I fear, is the exclusive preserve of my own dear child. (Sob)It makes me SO proud.