The Farlex Idioms and Slang Dictionary The Farlex Idioms and Slang Dictionary features idioms and phrases from across the English-speaking world, including American slang, British slang, Australian slang, and Irish slang, plus: Internet slang Abbreviations Proverbs Regional expressions And more! It's more than just a list of idioms: get details about the origin and history of both common idioms and rare ones, including in which countries they're used most.