Thong

noun

1. A strip of leather.
2. (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.
3. 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."

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