I watched one of the greatest films I have seen in some time last night: "Amores Perros", the Mexican movie. It was in Spanish with French subtitles. I love some of the Mexican expressions I had forgotten about (I was born and raised in Los Angeles). But there was one expression used often that I couldn't understand. Guys said it at the beginning of a sentence: sounds like 'guey' or "huey". Do you know what that word is? Almost like 'che' in Argentina.