en femme

Etymology
From the phrase, as in s’habille en femme. Compare the (English).

Adverb

 * 1)  Dressed in feminine clothing.
 * 2) * 2002 July, Jane E. Hegland, Nancy J. Nelson, Cross-Dressers in Cyber-Space: Exploring the Internet as a Tool for Expressing Gendered Identity, in the International Journal of Sexuality and Gender Studies, volume 7, issues 2–3, pages 139–161:
 * Most of them also “love to shop”—especially en femme[.]