What should I do about my brother?

Okay so I do my brothers chores all the time because he's super lazy and so when last night, I didn't feel like doing his work for him, he came in my room and got mad because he he was sleeping already and he had to wake up early in the morning because of saturday school because he skipped class on several occasions, and he was up u til like 11:30 anyway and this happened around 12. When he was in my room he said that I was selfish and that I couldn't do that for him this one time, and I countered that argument with several dates and facts about how Ive done that for him sooo many times before, and he does what he always does and says something stupid like "Oh you're so amazing and good-hearted(sarcasm)" because he tries to change what i say into a completely different context. So then I was talking and said something along the lines of "Ive done this so many times so don't give me your sh*t" and he through my head into the bed rest then i got up and was about to fight when my parents came in. Apperently my brother did that because I was disrespecting him, and I never called him any names I just said sh*t one time. And I said you earn respect not demand it, because although he's my older brother I deserve more respect from him than he does from me because he does drugs, gets bad grades, fornicates, like you've already heard ditches class, and one time he drove my parents car home drunk. And so he got mad and said next time I ever "disrespect" him again he's going to "Knock my b*tch-@ss out" or whatever when my parents aren't around. Im really not scared but I also don't want to have to kick his ***, so what should I do, Im really not afraid of him at all and he acts like he's so cool because he's older than me and I guess he thinks he's cool because he's a senior, sorry about the length but how should I handle this situation? I know this is long so thank you for actually reading.