devil-may-care
     adj 1: cheerfully irresponsible; "carefree with his money";
            "freewheeling urban youths"; "had a harum-scarum
            youth" [syn: {carefree}, {freewheeling}, {happy-go-lucky},
             {harum-scarum}, {slaphappy}]
     2: marked by a carefree unconventionality or disreputableness;
        "a cocktail party given by some...raffish bachelors"-
        Crary Moore [syn: {raffish}, {rakish}]
Source: WordNet® 2.0