FOPS is an acronym for 'Fops, DANDIES, DUDES, and POPINJAYS, ' which are all terms used to describe a certain type of person. A fop is someone who is overly concerned with their appearance and often dresses in a flashy or ostentatious manner. DANDIES are similar to fops, but they are more focused on fashion and style than on their physical appearance. DUDES are men who are fashionable and stylish, but not necessarily as extreme as DANDIES or fops. POPINJAYS are people who are vain and showy, often in an attempt to draw attention to themselves.