The term 'NATURAL HAIRSTYLES, FOR SHORT' can be abbreviated to FROS, which is a four letter acronym. FROS stands for 'Fully Rely On Styling, ' which is a term used to describe hairstyles that are created without the use of any chemical or heat-based styling products. Natural hairstyles are becoming increasingly popular as people look for ways to embrace their natural hair texture and reduce the amount of time and money spent on styling.