FIB Meaning of FIB in English ■ noun a trivial lie. ■ verb ( ~s , ~bing , ~bed ) tell a ~.Derivatives~ber noun OriginC16: perh. a shortening of obs. ~le-fable 'nonsense', reduplication of fable . Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004