The term 'COOL DUDE' can be broken down into five words: RAD (3 letters), HEPCAT (6 letters), GNARLY (6 letters), CAT (3 letters), and IDIGIT (6 letters). RAD is an acronym for 'Really Awesome Dude', and is often used to describe someone who is cool, hip, or fashionable. HEPCAT is a slang term for a person who is knowledgeable about jazz music and culture. GNARLY is a slang term for something that is difficult or dangerous. CAT is a slang term for a person who is stylish and fashionable. IDIGIT is a slang term for someone who is very smart and tech-savvy. All of these words together describe someone who is fashionable, knowledgeable about jazz, tech-savvy, and cool.