The term 'Dandy Guys' refers to a group of men who were fashionable and well-dressed during the 18th century. They were known as FOPS, which is an acronym for 'Foppish or Flashy Ornamental Person'. These men were often seen as vain and overly concerned with their appearance, but they were also known for their wit and intelligence. They were often seen as trendsetters in the fashion world and were known for their extravagant clothing and accessories.