Redneck is a mildly offensive term (according to how it's used) for a lower class working class white person (usually a man) from the southeastern states rural parts of the USA. Surprising that it's not an offensive term towards American Indians, it isn't (but most of them are welcome to use the term too, since they've earned the right, and anyone but a wannabe should know it. Yes, I'm talking to you, Garth!).