an abbreviation for the Latin phrase requiescat/requiescant in pace , meaning ‘may he (or she or they) rest in peace’. It is sometimes seen on people’s graves. The letters RIP are often used in cartoons (= humorous drawings) or other jokes to show that somebody has died.
RIP
Meaning of RIP in English
Oxford guide to British and American culture English vocabulary. Руководство по британской и американской культуре, Оксфордский английский словарь. 2005