1. Anyone who is away from their keyboard or busy with life or pm's, who doesn't answer in a room or pm box.
2. Any name placed in a chat room, but the user is not monitoring the room. Usually these names never reply when someone types or talks to them.
Example: Julie hasn't answered anyone in the room today, she must be in a chat coma.
Flirting in a private message or instant message. Usually related to people who try to pick up other by Flirting with them in private.
Example: Joe's a regular dog, he tries to Mackin the box with all the fine ladies.
When you have been in chat so long that you do not have any chat feelings left. Usually after you have been beat silly by all the chat bullies, one after another.
Example: Johns feels numb in chat and doesn't react to what is being said about him. He must have had his chat labotomy!