Top Definition
The paranoid feeling that someone you are chatting with is doing something else, especially chatting with someone else, while you are chatting with them.
When she started loosing track of the conversation and taking too long to respond the chatinoia set in.

Maybe it's chatinoia but I think he was using another screenname to cyber with that chick he just met.

WTF is with the chatinoia! We chat for hours! Are you taking your meds?
by Gendznshmalts July 25, 2009
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