Australian and New Zealand Slang

Australian Explorer: Australian Slang - Australian slang grouped by category (Animals, Behaviour, Events, Objects, People, Phrases, Places).
Dictionary of Australian Slang - A short listing of Australian slang words.
Koalanet Australian Slang Dictionary - Indexed glossary of Australian slang.
NZ English to US English Dictionary - "The following is an incomplete list of expression and words commonly used in New Zealand followed by the U.S. equivalent definition. Many of these words, phrases and expressions are of British or Australian origin."
Wikipedia: Australian English vocabulary - Article about the development of Australian slang.