Why do women slut shame each other?

Unfortunately because of jealousy, hurt, society. If a girls boyfriend goes on and flirts with someone other girl some girlfriends will blame the girl and not the guy, will call her names like slut because she’s getting with a taken guy. She’s hurt and angry. Also because Of society females that wear revealing clothes are slut shamed, just for their clothes. It just sucks. Wish people would stop judging others for they’re clothes, or assuming things about someone, especially females because then it makes it okay for guys to slut shame.

I guess because they feel it's shameful to be a slut.