the loud sound made by a lot of people talking at the same time 喧闹声；嘈杂声 a situation in which there is a lot of noise, excitement and activity 喧闹；骚乱；混乱 the hubbub of city life 闹哄哄的城市生活 He was left wondering what all the hubbub and expectancy had been about. 他不知道所有的喧嚣和期望是什么。
Word Originmid 16th cent.: perhaps of Irish origin; compare with the Irish exclamations ababú, abú, used in battle cries.