Wiktionary
a. Lacking coverage over the area of the crotch
Usage examples of "crotchless".
Bill talked about giving his girlfriend crotchless panty hose for Christmas while Letterman looked appropriately flustered.
The salesgirl, very sexily dressed and made up, just smiled as Minni showed me crotchless panties, bras with holes for the nipples to show through, filmy nightgowns, garters, patterned nylons, very short tight skirts only about 10-inches from waist to hem, see-through blouses, and all sorts of other stuff.
One of the gifts he gave me was a lovely sheer babydoll nightie that came with a set of crotchless panties.
And this reminded me that I was supposed to be conducting an illegal search, not comparing anatomical features with women wearing crotchless panties and spiked dog collars.
Rosie walked slowly, looking in the windows of secondhand clothing stores trying to pass themselves off as grunge boutiques, shoe stores with signs reading buy american and clearance sale in the windows, a discount place called No More Than 5, its window heaped with dollbabies made in Mexico or Manila, a leathergoods place called Motorcycle Mama, and a store called Avec Plaisir with a startling array of goods — dildos, handcuffs, and crotchless underwear — displayed on black velvet.