Etymology
Advertisement

cheerio (interj.)

upbeat parting exclamation, British, 1896 as cheero; 1918 as cheerio; from cheer. The breakfast cereal Cheerios debuted in 1941 as CheeriOats; the name was shortened in 1945.

Advertisement
Advertisement
Definitions of cheerio

cheerio (n.)
a farewell remark;
Synonyms: adieu / adios / arrivederci / auf wiedersehen / au revoir / bye / bye-bye / good-by / goodby / good-bye / goodbye / good day / sayonara / so long
From wordnet.princeton.edu