dishabille 
February 20, 2005 | 02:20

Dictionary.com/dishabille:

dishabille (dis-uh-BEEL) noun

  1. The state of being partially or very casually dressed.
  2. Casual or lounging attire.
  3. An intentionally careless manner.

[French déshabillé, from past participle of déshabiller, to undress : des-, dis- + habiller, to clothe; see habiliment.]