Note (15 Feb 2009): I haven't touched this in many
years (as the timestamps on these pages suggest), but apparently
people are still coming here to look at things. That's great!
You might also want to go take a look at
The Septic's Companion: A British Slang Dictionary,
a web page and (printed) dictionary of British slang
by a Scotsman living in America
[this is a blatant commercial plug (for which I received a free
copy of the book) ...]