Idioms are words and phrases in a language that have come into existence for a variety of reasons, some obvious enough, some inexplicable, but most of them appropriately and delightfully characteristic of the race that created them. American idioms are no exception; they reflect American culture at every social level. They are used in everyday life, in speaking and in writing, in movies and on television, and by people from all walks of life. Some of them may be unfamiliar even to some Americans, especially ESL (English as a Second Language) learners. In this book, there are approximately nine-hundred American idioms selected for ESL learners to provide them with a better understanding of American English. Learn them so that you may know what they mean when they are used by Americans, and use them in their right context in your speaking and writing in your daily contacts with Americans. Each American idiom comes with a simple explanation followed by one or more examples, showing you how to use it. Make an effort to learn ten American idioms a day, and then review what you have learned over the weekend. Then proceed to learning another ten, and so on and so forth. You may not remember all the American idioms that you have learned, but, rest assured, they will come back to you when you hear them in your social contacts with Americans. Learning American idioms is as important as learning the vocabulary, the sentence structure, and the grammar usage of American English. If you plan to stay in the United States, learning American idioms is a must.