For me, it's occasionally coming up when I listen to comedians. A year back I also heard a story about a white person who grew up poor, became financially stable with a good job, and then punched down and started calling other white people "white trash."

To me it's obvious this is poor-shaming. But I have a feeling it's far more complex than that. I'm not even white and I feel degraded whenever I come across those words. I barely know what it means, but it breaks my heart anyways to hear.