Plonker.com

English Idioms and Slang
Alphabetic dictionary of English colloquial words and slang
web1.150240.vserver.de/

The Grammar of Slang
Article analyzes the grammar behind contemporary slang. Includes the various uses for 'like', 'stuff', 'whatever', and 'so'.
fruitbowl.spcomplete.com/

The Online Dictionary of Playground Slang
An indexed dictionary providing many of the colloquialisms and slang words used, past and present, over the English-speaking world.
www.odps.org/

Larry's Aussie Slang
Indexed slang and phrase dictionary.
www.angelescity.com/

Internet's Recommended Slang Links
Large collection of links to slang-related dictionary sites for regional varieties of English. There are also links to specialized slang in English and to sites on slang in German and in Scandinavian languages.
www.spraakservice.net/

Everyday English and Slang in Ireland
A comprehensive dictionary of Irish Slang with an "optimised for Print" page. Updated frequently.
www.at.artslink.co.za/

Australian Slang Dictionary
Collection of Australian slang words.
www.koalanet.com.au/

A Guide to Irish Slang
From Arse to Maggot here is a full list of common Irish Slang
www.irishabroad.com/

The Dictionary of Informal, Slang and Idiomatic Phrases
Definitions for all the common expressions used in everyday English speech, with examples of sentences using them.
www.geocities.com/

Filters Magazine slang repository
slangin' up a fresh plate o' new words fo' that ace! Skateboarding and pop culture.
www.filtersmag.com/