scarlet woman
noun /ˌskɑːlət ˈwʊmən/
/ˌskɑːrlət ˈwʊmən/
(old-fashioned)- a woman who has sexual relationships with many different peopleWord Originearly 19th cent.: originally applied as a derogatory reference to the Roman Catholic Church, regarded as being devoted to showy ritual (Rev. 17).