Brief briefs, also known as underwear or undergarments, are a type of clothing that covers the lower half of the body. The two most common types of brief briefs are 'UNDIES' (6 letters) and 'bvds' (4 letters). UNDIES are typically made of cotton or synthetic materials and are designed to be comfortable and provide support. Bvds are usually made of spandex or nylon and are designed to be form-fitting and provide a snug fit. Both types of briefs are popular among men, women, and children.