1. one whose
chief interest is seducing women; a successful womanizer
2. a man who behaves selfishly in his sexual relationships with women
In the play "The Fair Penitent" (1703), by
Nicholas Rowe, Lothario is the character that seduces and betrays
Calista. The word "lothario" has thus entered the English language as an eponym: a lothario could mean a handsome, seductive ladies' man.
I
said I was so glad he thought Eddie was
funny. He said, he is something of a Lothario, isn't he? I said Eddie was not really, and he said, well, he loses his head a
bit, if you know what I mean.
– excerpt from "The Death of the Heart"