Roger’s Profanisaurus is one of the best things known to humanity. Sadly, Viz’s online presence is a steaming pile of shit. Happily, the Profaniwiki exists. It’s an open-source, Wikipedia-esque dictionary of swearing.
At the moment, the entries vary substantially in quality. Viz works because the writers are intelligent and articulate and sweary; far too many Profaniwiki entries are inarticulate and illiterate nonsense. But it’s a wiki, so you can change that – and I strongly recommend that you do.