How can I politely tell my roommate that she is obnoxious?

I have the roommate from hell. She is loud, obnoxious, rude, and annoying! She constantly brings guys in the room really late at night, she masturbates loud and violently for hours, and she is so heavy that she sounds like an elephant galloping across the floor.

Every time that I hint that she is being inappropriate, she accuses me of being racist against black people, which is completely bogus. How can I politely ask for her to be considerate?

I’ve tried to bring it to her attention and I’ve failed completely. I’m about to beat her with a sack of bricks.