womanizer
Definitions
A man who habitually engages in casual sexual relationships with women.
A man who behaves in a flirtatious or predatory manner toward women.
Examples
He gained a reputation as a notorious womanizer who never stayed in a relationship for long.
Despite his charming personality, she was warned that he was a womanizer who would only break her heart.
Synonyms
philanderer casanova don juan lady-killer rake playboy gallivant