Real Dictionary

playboy
countable noun: You can refer to a rich man who spends most of his time enjoying himself as a playboy.

playboy in American English
a man, esp. a man of means, who is given to pleasure-seeking, sexual promiscuity, etc.
noun: a man who pursues a life of pleasure without responsibility or attachments, esp. one who is of comfortable means

playboy in British English
noun: a man, esp one of private means, who devotes himself to the pleasures of nightclubs, expensive holiday resorts, female company, etc