AFK

Use this command whenever you are going to be away from the keyboard for a bit. Anyone who tries to tell you something will be permitted to do so, but they will also be informed that you are AFK so that they don't get the false impression that you are ignoring them which has been known to lead to bad feelings here and there. If you would like, you can specify a reason for why you are going to be afk.

As soon as you enter anything, you will be out of AFK mode.

For example:

afk
afk at lunch

NOTE: AFK = "Away From Keyboard"