Definition of alleleu in English:

alleleu

(also aililiú)

exclamation

Irish English
rare
  • Originally and chiefly Irish English. Expressing distress, horror, surprise, etc.

Origin

Late 17th century (in an earlier sense). Apparently from Irish aililiú, interjection indicating surprise or sorrow (although this is first attested later: 1740 or earlier), of imitative origin.

Pronunciation

alleleu

/ˌalɪˈluː/