Idiomatic speech undergoes constant change in all languages. Updated to reflect current informal written and spoken expressions in Spanish, this pocket-size book presents approximately 2,000 idiomatic Spanish expressions, followed up with their English translations and meanings. 
From the Reviews:
"Intended primarily for English speakers, this practical, pocket-size paperback includes approximately 2,500 Spanish idioms, arranged under keyword in alphabetical order, followed by their English translations. Idiomatic expressions, especially in a second language, are never easy to grasp, yet those included here, which come from contemporary spoken Spanish from Latin America, are clearly accompanied by brief, illustrative sentences to clarify meaning. Common English idioms, pronunciation guides, and abbreviations are appended."