what does inb4ban means or something same to it?i dont really understand the "in"b4ban.can you guys tell me?

It is when you post before whatever happens like if some 1 trys to make a scam with a thread you could post inb4ban

It's just a funny little prediction thing. Maybe ingame, someone would line up a decap and you could say inb4decap.
I don't recommend doing it on the forums because it is insanely annoying and useless. Best just to use the report button or keep out of it.

inb4 this thread is closed

in befor thread is closed.
oh wait, i did it wrong

saying something befor it happens = inb4somethinghappens