The term 'Broad Sashes' can be summarized as a type of sash worn around the waist. The word 'OBIS' is an acronym for 'Oriental Broad Sashes', which are traditional sashes worn in East Asian cultures. These sashes are typically made from silk or other fine fabrics and are often decorated with intricate embroidery. They are usually worn over a kimono or other traditional clothing and are used to signify rank or status.