Meaning of FLUTTER in English
[noun] [C]I could hear the flutter (= noise) of wings on the roof.(figurative) The publication of her first novel last autumn caused a flutter (= brief period) of excitement which was soon forgotten.(figurative) When economic statistics are first published they grab headlines and put markets in a flutter (= in a confused and excited state).(figurative) Peter was coming round for dinner and I was all of a flutter (= in a state of nervous excitement).
Cambridge English vocab. Кембриджский английский словарь. 2012