dishabille

noun

Etymology: From French déshabillé.

1. Extreme casual or disorderly dress, for example, with the shirttail out, sleeves unbuttoned, etc.

   “When I rallied him for viſiting me in ſuch a diſhabille, he ſtood a tiptoe to view himſelf in the glaſs; and owning I was in the right, ſaid that he would go and dreſs himſelf before dinner.”

   “Wherever they went, some pattened girl stopped to curtsy, or some footman in dishabille sneaked off. Yet this was an abbey!”

2. A loose, negligent dress.

   “She wore a dishabille of mignonette-green silk and bead-diapered head-dress that added several inches to her height […]”