if someone “fights like a girl” you should be absolutely terrified of them have ever seen a girl fight they’ll rip your fucking throat out with their hands while the guys are still doing that weird cobra posturing thing for five minutes
When I was a teacher at an “alternative school” in the US, we had an unofficial standing rule - you can step between a gang fight if the fighters are boys. Girl fights, though? Just step away. Girls don’t stop. They have nothing to prove, and quantities of hatred that mere men would wilt at. I personally have stepped between (young) Crips & Bloods and ended fights with a look of “I fucking dare you to hit me.”
I have tried to step between girls fighting in my current (not-US) country, and even if I knew and had a positive relationship with one or both of the girls, I could not break up the fight. I am at least twice the size of the majority of my students, height- and width-wise. My physical presence is intimidating purely on size (and a well-honed “I fucking dare you” look tried and tested in Texas). We finally were able to end one of the fights by turning the hose on them. The antagonist in this case later found the other girl in a classroom (in the middle of class) and stalked in, knocked her down, and kicked the hell out of her in military grade ROTC boots. I shit you not.
Fight like a girl? You better fucking hope you fight like a girl.