Just think of a word which means someone is a scaredy cat or a wimp. Kind of slang and adult language I use because I'm an adult and you're most likely too young to know its meaning, origin and what it is slang referring to.
Cowgirls is an insulting slur to them. They can be wimps out there on the field. They act like the stereotypical blonds more. No insults are directed at women because hell I will kick someone's door over for harassing someone in a children's game. There's the confusion gone.