your mother was a hampster and your father smells of elderberries!
When you reach the auto attendant at Stardock (it's the insult option if you ever call) we have the clip of Cleese saying "Your mother was a hamster and your father smelt of elderberries" It's pretty funny. (You can also listen to a cow moo or get a compliment)
"When I first came here, this was all swamp. Everyone said I was daft to build a castle on a swamp, but I built in all the same, just to show them. It sank into the swamp. So I built a second one. That sank into the swamp. So I built a third. That burned down, fell over, then sank into the swamp. But the fourth one stayed up. And that's what you're going to get, Lad, the strongest castle in all of England."