This dictionary is a collection of slang and colloquial expressions in frequent use in the United States in the twentieth century. It contains expressions that are familiar to many Americans and other expressions that are used primarily within small groups of people. The entries represent the language of the underworld, the nursery, the college campus, California beaches, urban back streets, and Wall Street. We hear from prisoners, surfers, junkies, Valley Girls, blacks, weight lifters, and just plain folks. Fad words, metaphors, wordplay, and various figures of speech make up the body of the dictionary.