Prometheus 6

Too angry for words? Then you need help. Check out Insultmonger.

The Insult Index is well organized. Regular P6 readers may want to go straight to the political insults: Everyone from Chester A. Arthur to Woodrow Wilson is covered. There's a dictionary of offensive slang, and Swearasaurus will teach you swearing, profanity, obscenity, blasphemy, cursing, cussing, and insulting in 131 languages. And if you're not speechless but just lazy, they have a series of random insult generators for several purposes, including a Shakesperian insult generator toucan download for use on your own site.