From Longman Dictionary of Contemporary Englishlibertinelib‧er‧tine /ˈlɪbətiːn $ -ər-/ noun [countable] literary BAD PERSONsomeone who leads an immoral life and always looks for pleasure, especially sexual pleasure —libertine adjective
Examples from the Corpus
libertine• For if a libertine knows he can indulge himself with impunity, he will throw all cautions to the winds.• Take one step away from those laws and you become a lecher, a libertine, an assassin.• Although he is quite a libertine with the women, this particular President, I understand.• Much emphasis was placed on the raffish past, with roll-calls of distinguished libertines.• But the libertine who turned to religion in maturity seemed to get undue credit.Origin libertine (1300-1400) Latin libertinus “free person”, from liber; → LIBERTY 