Entry 1 sense Webster, 1913 Hullabaloo /hŭlˌ-əb-əl-o͞o'/ · Hul·la·ba·loo · IPA /ˌhʌləbəˈlu/ 01 n. A confused noise; uproar; tumult. 1. A confused noise; uproar; tumult.[Colloq.]