I've searched everywhere, but I can't find it.
I'm pretty sure you can get into it, because I've been linked there before in one of Fish's post, but I can't find it anywhere, not even Google could.

Is this what you're looking for ?
http://forum.toribash.com/forumdisplay.php?f=551

No, it is actually called "Whinebox".

Only staff can see it.

Your options:

1. Become a member of the staff.

2. Get banned*.

*Getting banned means you only get to see your own threads in the Whinebox, though.

I'm pretty sure I've been there before, managing to see all of the threads (including others) through a link, and I'm pretty sure I'm not staff.

I don't know what to think here... Maybe a glitch?

Do I need to repeat myself again?

Ah, ok.
Now, another problem I just had.
I can't seem to close this thread, all my other threads show the close thread option, except for this one, can someone tell me why?

All threads in rapid threads cannot be closed by the thread maker him/herself. The only way to close it is to request it here.

Thank you.
Requesting thread to be closed.