CUI BONO? Meaning of CUI BONO? in English [ kwi:'bɒnəʊ , 'bəʊ- ]■ exclamation who stands to gain (i.e. from a crime, and so might have been responsible for it)?OriginL., 'to whom (is it) a benefit?' Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004