The term 'Hair Hider' refers to two items of clothing that can be used to cover up one's hair. The first is a HAT, which is a head covering typically made of fabric or straw and often has a brim. The second is a dorag, which is a type of scarf or bandana that is worn around the head and is usually made of cotton or silk. Both of these items are commonly used to hide or cover up one's hair, making them popular among those who want to keep their hair out of sight.