Surprised you never heard of it.

Fascists love to bring it up as proof of White people being enslaved to downplay the racial character of the Trans-Atlantic Slave Trade, same as with Indigenous slave owners. Of course it doesn't work because the Irish weren't viewed as White until relatively recently (or in the case of Northern Ireland still aren't) but fascists don't know anything and accuracy isn't the point.

Romans enslaved Ireland for their labor, depopulating the island for to serve on british plantations.

Then the British deported many Irish to the Caribbean and/or pressed them into indentured service, that’s why there is like Irish influence in Patois and Bajan creole.

Of course the miserable economic conditions intentionally fostered meant that Irish people became a main source of cheap industrial manpower for the factories of the US and UK.