1. A person of Polish descent, who is
unfortunately targeted by ignoramuses and fools as being dumb and stupid. Yeah, and the British/Americans are the ones talking...
2. A term used between Poles (teens) humorously, when talking about the
incompetence of a person of their same kin. Usually considered
offensive if a non-Pole says it (casually) to a Pole. (like "nigger" among Blacks)
Etymology - "Polack," from the Polish word "Polak," meaning male Pole, "Polka" is a female Pole.
1700's.