I was reading manga the other day and came across these nicknames that I can't make sense of.
The context is as follows: Some mischievous students in a certain high school are bragging about their past. It's a contest to see who is the baddest of the bunch. But one of these students is diligent, and so, they are picking on him.
As I understand it, this is describing someone who sends people to the hospital, but I have no idea what the
三中の is referring to. The same goes for the second one.
Some other nicks that I have trouble understanding are