What should i do.....?

My mom is a horrible drunk. She gets wasted every night and usually is abusive. She hits me and calls me names. E.G. "Your doing homework? Haha! That only helps if your not stupid as ****. You'll never be half as good as your father." She pretty much tells me that I am worthless. All my friends get money for good grades but I make straight As and my mom says she's going to take a doubleshot for me... I am starting to think the alcohol has taken her over. She doesn't wear makeup anymore. She smells like a urinal and has a sunken in face. She spits when she talks and loves to get right in your face. What should I do?