In the nerd world known as World of Warcraft, there is an in-game chatting feature so you can communicate with the other people you collaborate with. There is a lot of shorthand that has developed through such avenues as this, along with Instant Messager, and various other chat programs. The shorthand 'brb' stands for 'be right back'. Meaning you are going away for a short period of time, but will return.
Don't worry, I haven't abandoned my blog (for the 3 or 4 of you that care). I'm just working on a very lengthy and in-depth series of posts that won't be done for several days. So if I don't post anything until then, rest assured that I haven't fallen off the planet. I will brb.
Maybe I'll just post random song lyrics until I return in full force.