What does 'Black Irish' mean?
Black Irish is a dark person of Irish or mixed-Irish descent, a term used chiefly in the United States.
I think you may mean Black Irish and I found the answer in Wikipedia: Black Irish is a traditional term that is commonly used among Irish American communities to describe a dark brown/black hair phenotype appearing in Caucasian people of Irish descent. This can be distinguished in contrast to the (lighter) brown, blond or red hair color variant, the latter stereotypically perceived to personify the look of typical Irish folk
"Black Irish" is a term invented in America to explain away darker Irish people who don't fit the American stereotype. Irish people often don't understand the term. The Irish, Welsh, Scottish, and many English are actually descended from Iberian migrants who colonized the British Isles around 10,000 years ago. There are indeed Africans living in Ireland today, so the term now becomes ambiguous.