The term 'flapper accessory' refers to two items of clothing that were popular in the 1920s. The first is a TAM, which is a type of hat with a wide brim and a flat top. The second is a BOA, which is a long, feathery scarf that was often worn around the neck or shoulders. Both of these accessories were popular among young women during the Roaring Twenties, and they helped to define the flapper style of the era.