The document discusses different types of mullet hairstyles, including the classic mullet, skullet, femullet, mullhawk, and businessmullet. It provides descriptions and examples of each mullet style, from the classic long hair in back and short on sides, to hybrid styles like the mullhawk that combines a mullet and mohawk. The document concludes that the mullet hairstyle is defined by its contrast of short hair on top and longer hair in back.