CSA briefly mentioned below...............................

In case the title wasn't obvious enough, my brother physically, sexually, and emotionally abused me when I was younger. The problem is that he still lives with us. My parents are aware of past goings-on, but to be honest they really just don't give a *****. He is CONSTANTLY telling me jokes and showing me pictures that are VERY inappropriate for a brother to be telling/showing his sister. I'm 17, I'm not a godd*mn little girl anymore, and I'd (literally) kill him before I ever let him touch me again, but this bothers me! How do I get him to stop???? (Short of kicking him where it hurts or smashing a chair over his head...though I'm tempted...)