What Did He Say?

The Online Dictionary of Playground Slang is actually four dictionaries available at one web site. The four, in alphabetical order, are: Ghastly Games, Hymns & Arias, Online Dictionary of Playground Slang, and Seedy Songs and Rotten Rhymes. You can search for terms in any single dictionary or all at once. From the definitions the site appears to have a strong bias toward British playgrounds, etc. So you still may not find all the American slang definitions you want.