Top Definition
A form of Attention Deficit Hyperactivity Disorder that only pertains to online chatting. Very frustrating for the person on the other end who is waiting for your reply while you are playing with your cat, answering the door, or just plain spacing off. Seriously, if I stop what I am doing and walk over to chat with you had best pay attention. &*%$!!!
You have Chat ADHD if you leave people hanging waiting for a reply after you initiated the session.
by thedieselwhisperer March 30, 2011

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