The term 'British Farewell' is a combination of two words, 'CHEERIO' and 'Tata'. CHEERIO is a 7-letter word that is used as an informal way to say goodbye in the United Kingdom. It is often used when saying goodbye to friends or family. Tata is a 4-letter word that is also used as an informal way to say goodbye in the United Kingdom. It is often used when saying goodbye to acquaintances or strangers. Together, these two words form the term 'British Farewell', which is a common way to say goodbye in the United Kingdom.