1
general::
Phrase(s): in drag
wearing the clothing of the opposite sex. (Usually refers to a man wearing women’s clothing.) • Two actors in drag did a skit about life on the farm. • Gary looks better in drag than he does in a suit.
McGrawhill's American Idioms And Phrasal Verbs
2
general::
Wearing clothes normally worn by the opposite sex, as in All of the actors in the revue were in drag. This expression originally alluded to male actors wearing women's apparel on stage, especially for comic purposes, but Also refers to cross-dressing by homosexuals. [Colloquial; c. 1870]
American Heritage Idioms