[adj] marked by a carefree unconventionality or disreputableness; "a cocktail party given by some...raffish bachelors"- Crary Moore [adj] cheerfully irresponsible; "carefree with his money"; "freewheeling urban youths"; "had a harum-scarum youth"
carefree, freewheeling, happy-go-lucky, harum-scarum, irresponsible, raffish, rakish, slaphappy, unconventional