hul|la|ba|loo [ˌhʌləbəˈlu:, ˈhʌləbəlu:] n [singular] informal
[Date: 1700-1800; Origin: Perhaps from hello + Scottish English balloo a word used to make children keep quiet]
1.) excited talk, newspaper stories etc, especially when something surprising or shocking is happening
= ↑fuss
There was a huge hullabaloo when the book was first published.
2.) a lot of noise, especially made by people shouting
She looked up to see what all the hullabaloo was about.

Dictionary of contemporary English. 2013.