What is the ‘Karen’ thing all about ?

A white female who feels entitled about anything even tho she is wrong 

Karen is a pejorative term for someone perceived as entitled or demanding beyond the scope of what is appropriate or necessary. A common stereotype is that of a white woman who uses her privilege to demand her own way at the expense of others. Depictions also include demanding to "speak to the manager," being racist, being anti-vaccination, or sporting a particular bob cut hairstyle. As of 2020, the term was increasingly being used as a general-purpose term of disapproval for middle-aged white women.

Anti-white racism.

People ***** and moan about cultural appropriate by white folks from other cultures. But then, they don't want white people to be allowed to embrace their own culture.

Entitled white women being terrible people.  Calling the police when people of colour are simply existing, or refusing to adhere to store/business policies on wearing masks and having temper tantrums when called out.

A person, usually a woman, melting down over a VERY important thing or idea, such as the color of your eyeliner, and publically making a nuisance of herself. She makes "dumb blondes" very desirable.

Mostly towards women who act as if they are superior and think they are better then others. They also believe they are never wrong. 

It's a racist leftist slur.