Toodle-pip! (3)
(Other definitions for bye that I've seen before include "So long" , "Cheerio" , "See you" , "Run scored in cricket from a ball that passes batman" , "[ADIEU]" .)
(Other definitions for bye-bye that I've seen before include "See you" , "Au revoir for juniors?" , "Ta-ta" , "Informal repetitive farewell" , "So long" .)
(Other definitions for cheerio that I've seen before include "A final word" , "British romance imprint" , "A hearty farewell, begins with applause" , "Informal goodbye, sounds blithe" , "Bye-bye" .)