Occurs when two people are chatting online, particularly facebook chat, and one person says they cannot talk anymore. The person signs off to show they're offline to purposely stop talking, then signs right back on. AKA shutting you out.
Reasons for this include annoyance, you don't know the person, or you are just having a bad day and do not want to carry on a conversation that is completely pointless.
Dude 1- "I was talking to Karen the other night and she said she had to go. But then when she signed off, she signed right back in."
Dude 2- "Man, you totally got the cold shoulder chat."
Dude 1- "Do you think I have any luck with her?"
Dude 2- "No way in hell man..."