libertine

(noun) a dissolute person; usually a man who is morally unrestrained. Synonyms: debauchee, rounder.

(adj) unrestrained by convention or morality. Synonyms: debauched, degenerate, degraded, dissipated, dissolute, profligate, riotous, fast. Examples: "Congreve draws a debauched aristocratic society." "Deplorably dissipated and degraded." "Riotous living." "Fast women."