Is this considered abuse?

Today my sister somehow got mad at me. I didn't do anything to provoke her. She lashed out and called me a slut then a prostitute. Then she said in front of my mom that she knew I was smoking weed in the basement with my friend(I wasn't even in the basement and haven't smoked pot in a long time). Then she grabbed my sweater near the neck and started to push me into the wall and basically slam me over and over. She basically threw me around. My mom ddint do **** about it. This has happend so many times before. I'm scared now because she said she's going to kill me. I want to press charges. I don't care what it'll do to my family. She deserves it and she has ruined my ******* life. Please help. Btw she's 18. I feel abused both mentally an physically.