Abbreviations and other "jargon"

[bkreezy08]

Now I haven't played poker for a few months, but I'm getting back into it and wanted to check out these forums. Problem is, I can't understand what people are trying to say half of the time because of so many abbreviations. For example "This player was a 21/12/6" - what is that? I'm guessing there's another topic similar to this, but I couldn't find it. Could someone give me some tips, or direct me to a thread where I can find them? Thanks.