My younger brother is hanging out with boys in my grade, what do I do?

I m 15, a freshman girl. My brother is 13 in 7th grade. He spends lot of time with his friends and my parents usually don t know what he s up to. They often get calls like "pick me up at 7/11 now," then they go and he says "wait I m at McDonalds". IFoundOut he s hangingout with 6 boys inMy grade. 15-17 year olds. I knowThem obviouslyBut don t talk toThem because they re weirdos. They re all meninsist gross ***** who only care about white cis straight men and think women s only purpose is sex and to send nudes. My brother is so embarrassing because he s loud andThinks he s the absolute **** with his friends. He swears and actsAll cool withThem. I don t want him hanging out withTheBoys, a friendOfHisIn 7th like him has a brother in my grade, and when my brother goesOver his friends house, his friends brother has friends over, the 6 kids 15-16. I toldMy parents to stop letting him hang out with them. I have anxiety and this is so embarrassing. I don t wantBoys in my gradeLooking at me and remembering things my idiotic brother said to them. It s so embarrassing, I don t know how to explain it to my parents because they don t care. my mom is too careless to stop it, and says the wrong things.all she said was give me the boys names in your grade. I won t. Bro won t listen to his mom if she tells him not to hang w them, he ll do it more. do you get how this is embarrassing to me more than I can even explain and why I shouldn t have to parent my bro more than his mom and dad?!