bye-bye

bye-bye
    n 1: a farewell remark; "they said their good-byes" [syn:
         {adieu}, {adios}, {arrivederci}, {auf wiedersehen}, {au
         revoir}, {bye}, {bye-bye}, {cheerio}, {good-by}, {goodby},
         {good-bye}, {goodbye}, {good day}, {sayonara}, {so long}]