I (a very white guy) just got called a "white nigger", WTF?!

I'm 42 yrs old and very "white." Today I went out for a jog at the local jogging trail. The parking lot is circular and when I got there I parked on the side where there were fewer people, because I have some social anxiety and because I'm a little self conscious about my paler than pale legs. There were two other cars on that side. One was a crappy old Saturn with a (white) woman with big bleached blonde hair sitting in it.

I put the visors down on my car to block some of the sunlight and hopefully keep it a little cooler inside. I know it won't really help but fuck it, it's my car, my visors and I do what I want with them. While I'm doing this, big hair bitch gets out and short cuts across the grass away from me to get to the trail. I get out and go the long way over to the start of the trail because I like to know what distance I've gone.

I go once around the trail, with only a quick walk and run for 1 mile which is pretty good for me. So I'm walking around the path again and catching my breath feeling pretty good and i see big hair bitch coming towards me. I figure I'll say hi like most people there do but before we get that close she says "What's the matter? Don't like niggers looking at you?"

I'm thinking WTF, is she trying to strike up a conversation and assuming I'm a racist asshole or something? So I say "I don't know what you're talking about."

I don't remember too clearly the rest of what she said but it was something like "Are you too good to be over there with those other niggers? You're a white nigger is what you are. How do you like it, white nigger."

I have no idea what this bitch was talking about. I replied with a sneered "what?" and an "Ok, whatever." and that was the end of it. Crazy people talking shit to me over imagined offenses aren't worth pissed off over.

Anybody have a clue what she might have been talking about?