libertine
     adj : unrestrained by convention or morality; "Congreve draws a
           debauched aristocratic society"; "deplorably dissipated
           and degraded"; "riotous living"; "fast women" [syn: {debauched},
            {degenerate}, {degraded}, {dissipated}, {dissolute}, {profligate},
            {riotous}, {fast}]
     n : a dissolute person; usually a man who is morally
         unrestrained [syn: {debauchee}, {rounder}]
Source: WordNet® 2.0