Pardon My Spanish! (Harrap)

I've bought three books of Spanish slang, this being my last purchase. It's also by far the best one. The content ranges from simple street slang, through mildly unpleasant all the way up to "Oh man, no way... I can't believe he just said that!" There's a huge selection too: with this book you can find an insult for every occasion.

The layout is very helpful too with the book divided into English to Spanish and Spanish to English sections. If you look up a word, you'll find not only the literal translation for that word, but a wide selection of phrases using that word. These phrases are then translated into the Spanish equivalent: most useful as if you're insulting someone, you want to get it right!

As I said, this is the best slang book I've seen and I highly recommend that anyone wanting to speak modern, real world Spanish buys this book.