When those "in the know" speak in acronym, they leave others "in the dark"

And there, perfesser, in a nutshell you have half the magic of language: for anyone still naive enough to believe this is a medium of communication, I would respectfully point out that exactly half of language effects are designed to define ourselves and therefore by implication define the outsiders. U and non-U, in a thousand tribal contexts! Communication in neat and continual apposition to obfuscation! Yah gotta just learn to roll with the punches, an' keep on laughin, guys! This is a secret code we're using, and my version (or idiolect, as was noted the other day) does not ever correspond exactly to yours...
speshully damerkins