over-chat 

While in a chat box, ignoring the dominant conversation by continuing to talk about themselves even if they are asked to stop.

In CC chat yesterday, Legend kept over-chatting the important conversation that everyone else was having.

I banned him from the chat box for over-chatting about his dwarf game when we were having crisis management session.

over-chat by CyAdora August 16, 2008

Over chatter

Term for the multiplicity of conversations when more than 4 people are together.

I couldn't hear what you were telling me because of the over chatter.

Over chatter by JohnODM April 27, 2013

Overchat 

When you have too many chat-windows open at the same time.

L: I have 3 chat windows open on omegle to screen out horny males.
T: That's like, overchat.

Overchat by Soph88 October 13, 2010