Usually used in internet chatrooms when someone is pretending to be away from the keyboard, also known as lurking.
They will not respond to any messages you send to them, they are only there to be entertained.
Shaniqua: Great, just watching tv.
Vagiguita: I heard about the new guy in your life, how is he? His names Nahoejay right?
Vagiquita: Shanni? You there?
Vagiquita: Bitch you went FAFK I know you're there...