I just found out who tf that Kostas the black (Κώστας ο μαύρος) is. To where I go for english lessons, everyone in my class is just randomly mentioning him and to be careful, that he even has a motorbike and some shit. At first, I was kinda worried like, who tf is that.

Turns out it's a joke. One time, a student had such bad results that got beaten up by his dad, or that's what we think at least. And the next day he came at the lesson cryin' and all and the teacher asked him what had happened to him. He said that Kostas had beaten him up (here we say that "you'll turn black" when we want to say that you'll get beaten up. But it's usually used by parents and it isn't like real bad violence or sth, dw.)

And now we just say to everyone to be careful of Kostas the black. And we're scarin' the newcomers, lmao.

Careful of him guys, it's so spooky.