What can I do so I don't have to stay home alone with dad??? Please help ASAP!!:(?

My dad is a dick to everyone, he cusses at my mom and I all the time plus he drinks all day. Everything he says is all about him and he is NEVER wrong in his eyes. I tell my mom to talk to him about how he treats me like a little slave he can push around but he always convinces her that he is doing what's best for us. If it were up to him I wouldn't go anywhere ever! Yesterday he came in talking about how I need to clean my room( was already clean) and I told him that I was doing some online schoolwork that has a deadline soon so I can graduate, he said to me and my mom that schoolwork should come last to cooking and cleaning. I have supposedly "all the time in the world to worry about it" when I don't! He cussed at me saying I didn't deserve anything I have and he works twice as hard as me (he just mowed the grass!) and I broke down crying because he kept saying the "look" I was giving him was forbidden. My mom stood up to him and he told her to go f*** herself. I'm 18 years old and want to leave but he said he will take "his" car which my mom paid for it's just in his name away if I don't stay. Today I couldn't even wash HIS car because it "took you three weeks" to decide to do it. I was busy!! My mom is going camping Thursday-Sunday this coming up week and I don't want to be here with him. Please think of something I could do! I just want to leave here and never come back!