1
general::
Also lady's man. A man who enjoys and attracts the company of women. For example, Because women seemed to seek him out at parties, Brian got the reputation for being quite a ladies' man. [Late 1700s]
American Heritage Idioms
2
general::
Phrase(s): a ladies’ man
Fig. a man who likes the company of women and whose company is liked by women, the suggestion being that he likes to flirt with them. • John is a real ladies’ man. He hates all-male parties. • The new boss is always flirting with the women in the office. He’s a bit of a ladies’ man.
McGrawhill's American Idioms And Phrasal Verbs