I feel like cutting off a friend of mine. I think he's kind of toxic.
What makes them so toxic in your eyes?
I have a bad temper and he can't seem to make his peace with it.
Well, you could always try to explain it to them. You should try to tell him how you feel before you just cut him off.
I tried, he just doesn't get it. I'm tired of him.
Given that you have a bad temper and he hasn't cut you off, it might mean he doesn't want to end the friendship. That can mean a lot, so I suggest seeing if there is something you can do to help with your temper. Your friend sounds like a decent person.