[adj] (informal) dazed from or as if from repeated blows; "knocked silly by the impact"; "slaphappy with exhaustion" [adj] cheerfully irresponsible; "carefree with his money"; "freewheeling urban youths"; "had a harum-scarum youth"
carefree, confused, devil-may-care, freewheeling, happy-go-lucky, harum-scarum, irresponsible, punch-drunk, silly