Demirep is just a person that belongs to

dem·i·monde /ˈdɛmiˌmɒnd; Fr. dəmiˈmɔ̃d/ Pronunciation Key - Show Spelled Pronunciation[dem-ee-mond; Fr. duh-mee-mawnd] Pronunciation Key - Show IPA Pronunciation -noun 1. (esp. during the last half of the 19th century) a class of women who have lost their standing in respectable society because of indiscreet behavior or sexual promiscuity. 2. a demimondaine. 3. prostitutes or courtesans in general. 4. a group whose activities are ethically or legally questionable: a demimonde of investigative journalists writing for the sensationalist tabloids. 5. a group characterized by lack of success or status: the literary demimonde.