A rather old slur directed at Irish people. In the late 1800s, the Irish were viewed as a secondary race by White Supremacists (see "Inbreds, Elite English") as were black people. (Who were conversely referred to as "Smoked Irish." I shit you not. People back then had ISSUES.)

These days, the terms has been embraced by Irish wannabe gangsters and thugs, et al, as a badge of honour. Look to House of Pain and Eminem as heroes.
Chap one: "Cracka mutherfucker! Get yo ass out of here!"
Chap two: "Sorry, my bad!"
Chap one: "Yo, you talk funny. Where you from?"
Chap two: "I'm Irish."
Chap one: "Sheeeet, you shoulda told me you was a nigga turned inside out! Gimme some love!"
by Gaz Edmunds October 3, 2006
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