thong

noun4

1. •
   A narrow strip of material, typically leather, used to fasten, bind, or secure objects.
2. •
   (US, UK) An item of clothing, usually an undergarment or swimwear consisting of very narrow strips designed to cover just the genitals and nothing more.

   • She was impressed by her friend's confidence to wear a thong on the crowded beach.
3. •
   [usually plural] (Australia) An item of footwear, usually of rubber, secured by two straps which join to pass between the big toe and its neighbour.

   • Because of August he wears shorts and sandals, the Japanese geta sort called thongs. — 1963
4. •
   The largest section of a bullwhip constructed of many straps of braided leather.