Whillaballoo means: An archaic Irish variant of 'hullabaloo' - meaning a loud, chaotic uproar, commotion, or noisy fuss. While 'hullabaloo' is still in everyday English use, 'whillaballoo' is the older Irish form,. The word is mostly archaic or historical; you will only encounter it in old texts, period drama, or school history rather than current teen conversation. There is no real cause for parental concern; it is descriptive vocabulary rather than risky behaviour.