Douglas Harper's Etymology Dictionary
Wiktionary
n. An article of clothing sufficient to cover the genitalia, primarily as used by an exotic dancer or in certain aboriginal cultures.
Wikipedia
A cache-sexe is an item, often a small garment, that covers its user's genitals. The most common style, seen in Western G-strings and Japanese Fundoshis, has a triangle of material (cloth, beaded strings, etc.) attached at the corners to straps or strings around the waist and between the legs, that fasten the triangle over the genitals.
Cache-sexes have various social intentions, including the wearer's practice of sincere or enforced modesty, legal and/or customary restrictions within the context of intentional eroticism, and adding fetishistic or playfully teasing aspects to intentional eroticism. In Western cultures, for example, G-strings appear as swimming attire; for many erotic dancing venues, as the final state of undress, set as the polite and/or legal limit; or as a garment whose removal is one of many steps of a striptease, each existing to provide an increment in the viewer's sexual arousal.
Cache-sexe is a loanword from French.
Usage examples of "cache-sexe".
She got hold of what she was after, the cache-sexe at the crotch of her fleshings, and yanked it out, then hastily rearranged her costume and grinned wickedly.
Florian finally announced, and the music blared into a fanfare, and Pepper casually tossed the cache-sexe to Edge and danced blithely into the pista.
Nevertheless, it was apparent enough to Pepper, and she seethed and sulked—especially when Florian finally took a good look at her act, saw the scantiness of her dress and commanded her to resume wearing the cache-sexe under her tights.
Neither of the girls wore anything underneath, except the little cache-sexe pads.
Paprika was beautiful all over, and he could not help noticing that, for she flung away her cache-sexe and was totally naked.
Then he stooped, seized the neck of her spangled fleshings, and ripped again, and finally tossed away her last covering, the little cache-sexe pad.
So, at succeeding shows, Clover Lee was able to add the underwear of bandeau and cache-sexe that properly obscured what she had called her "every curve and nub and crack.
Lie in sun room pretend bean, with cache-sexe and dark glasses but in switched places.