Farewell Phrase In The UK
The phrase “cheerio” is used as a farewell greeting in the United Kingdom. The word “sedan chair” dates back to the 17th and 18th centuries in England, when these types of vehicles were employed to transport people rather than cabs. You would go to the front of your house, open the door or window, and yell “Chair ho!” in order to summon one, much like you would with a taxi.
As a direct consequence of this, the exclamation “Chair ho!” came to be connected with those who were leaving to go to a new location. “Chair Ho!” eventually became “Cheerio” as the years went by. It just so happens that Cheerios are a popular brand of morning cereal in the United States; therefore the “Yeah.” Fruit Loops to you, too, guy” replied.