Definition of ballyhooly in English:

ballyhooly

Pronunciation /balɪˈhuːli/

noun

(also ballyhooley)
Irish
  • Hell.

    Used in phrases in which hell is more common, to indicate harsh treatment, chaos, confusion, etc.

Origin

Mid 19th century; earliest use found in Tait's Magazine. Apparently from Ballyhooly (Irish Baile Átha hÚlla), the name of a village in County Cork, Ireland, apparently formerly notorious for faction fighting, although this may reflect a later rationalization of the word.