The term 'Dandy Guy' can be broken down into two crossword solutions, Jim (3 letters) and FOP (3 letters). Jim is a slang term for a man who is fashionable and stylish. It is derived from the name James, which is of Hebrew origin and means 'he who supplants'. FOP is an old-fashioned term for a man who is overly concerned with his appearance and spends too much time on his clothing and grooming. It is derived from the Dutch word 'FOP', which means 'FOOL'. Together, these two words describe a man who is fashionable, stylish, and overly concerned with his appearance.