From Longman Dictionary of Contemporary EnglishCasanovaCas‧a‧no‧va /ˌkæsəˈnəʊvə $ -ˈnoʊ-/ noun [countable] SYSEX/HAVE SEX WITHa man who has had sexual relationships with many women
Examples from the Corpus
Casanova• Heroism of a different order was on the menu of three of the greatest Casanovas of the age of sail.• And what sort of woman was she anyway, to treat his Casanova habits with such casual indifference?• Dave obviously thought he was a real Casanova.• Robert, the Casanova of the plains, was in a nicely stirred frenzy of desire and frustration.• Never, not even when some aroused, overweight, ugly Casanova had tried to paw her.Origin Casanova (1900-2000) Giacomo Girolamo Casanova (1725-98), Italian famous for having many lovers 