Karen

Incredibly self-righteous and over-confident woman who often rudely calls out others and threatens extreme action when she encounters situations that differ from her idea of what's correct. Often set-off by issue of morality and fairness, and she knows neither....

The kids were all lined up, but a Karen arrived and put her kin in the front of the line because she said that he was having an exceptionally bad day. Was surrounded on the sidewalk by too much "whiteness".