Insult Generator.

If you ever have the need to insult someone but don't really want them to get mad at you, you need Web Insult. Apart from being a transient amusement, Web Insult insults people in a Monty Python-esk' style.

There are four insult styles to choose from: Modern, Shakespearean, Arabian and Mediterranean. Here are some examples:

You undisciplined sliver of wild belly-button fluff.
You lost eruption of hairy lizard droppings.
You congealed accumulation of fresh cooking fat.
May emergency medical technicians eat each other's belly-button fluff on your lawn.

LINK