The French guard in "Monty Python and the Holy Grail" is the greatest insult hurler of all time! Here are some of his names for King Arthur and the Knights of the Round Table.
"Your mother was a hamster, and your father smelt of elderberries" is the Holy Grail insult I always remember first. I'd forgotten about "sons of a silly person" which is a close second.
bilby, this was also the French knight in "Monty Python and the Holy Grail".
"Yes, depart a lot at this time and cut the approaching any more, or we fire arrows at the tops of your heads and make castanets out of your testicles already! Ha ha haaa ha!"