Green’s Dictionary of Slang

(orig. US) an uproar, a great fuss.

[1812		Spirit of Irish Wit 142: If I dismiss you this time, will you go quietly [...] and raise nomore riots [...] hark’ee, Mr Street Keeper, no more of your Hurroo Pats, if you please].
1901		Bulletin (Sydney) 21 Dec. 13/4: Some Bathurst (N.S.W.) Jay Pees, annoyed at Attorney-General Wise cheating them out of a sectarian shindy by his dignified rebuke of Police-Magistrate O’Neill’s wild hurroo about the ‘godless public schools,’ called a meeting to further discuss the matter.
1917		R.L. Mackay diary 16 Aug. 🌐 Heard that 16th. Irish Division had taken the Green Line and that we are to relieve them, and do a ‘horoosh’ as the men call it.
1959		J. Thompson Getaway in Four Novels (1983) 74: It was mostly nut stuff [...] the kind of hooroosh that always sprang up around a big name or a big kill.