This book serves as a guide for those who are teaching or learning American English. Topics include the rationale for studying the language; the history behind numerous American words and phrases; aspects of figurative language; American proverbs; shades of meaning in American English; American names for people, places, and things; catchphrases, slogans, and mottoes; American historical documents and speeches; American acronyms and initialisms; and word games in American English. The book illustrates how American English is a dynamic mixture of words that are a testament to the country’s inventiveness and sense of humor. End-of-chapter activities are provided in both English and Spanish.