How to get it: Pass the LUA graduation test.
i believe you need to click the scripting part and there you will see the rest
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well look at the top you see forum and market and stuff
at right you see unibash
ther click it and go to the scripting part and i believe its there
Irc= Instant relay chat
Go here:
http://forum.toribash.com/chat_view.php?channel=unibash
Or read up about irc and get an irc client so you can connect to the Toribash network.
As for the achievement, it is not currently possible to get it as the modding and scripting section of Unibash is not currently active. I believe that ingame, market and clan sections are active however.