thong

A narrow strip of material, typically leather, used to fasten, bind, or secure objects.

(usually, in the plural, Australia, dated, _, in, _, US) An item of footwear, usually of rubber, secured by two straps which join to pass between the big toe and its neighbour.

(UK, US) An item of clothing, usually an undergarment or swimwear consisting of very narrow strips designed to cover just the genitals and nothing more.