n [ C , U ]
a sweet, clear, fizzy drink (= one containing many bubbles) without alcohol, similar to lemonade and sold in cans or bottles. It was first produced in the US in 1929 and for many years was advertised as ‘the Uncola’.
7UP
Meaning of 7UP in English
Oxford guide to British and American culture English vocabulary. Руководство по британской и американской культуре, Оксфордский английский словарь. 2005