thong

noun

• A strip of leather.
• (usually in the plural) An item of footwear, usually of rubber, secured by two straps which join to pass between the big toe and its neighbour.
• An undergarment or swimwear consisting of very narrow strips designed to cover just the genitals and nothing more.

  "No! I won't buy you a thong. You're too young for that."

• The largest section of a bullwhip constructed of many straps of braided leather.