Definition of Oirish in English:

Oirish

noun

derogatory
  • Frequently with the: Irish people considered collectively.

adjective

derogatory
  • Originally especially in representations of Irish speech: = "Irish". Later also: exaggeratedly, sentimentally, or putatively Irish in style, character, etc.

Origin

Mid 19th century; earliest use found in The Caledonian Mercury. Representing an Irish English pronunciation of Irish and Irish, often taken as indicative of exaggerated or pseudo-Irish speech.

Pronunciation

Oirish

/ˈɔɪrɪʃ/