1 definition by Karen Owens

Top Definition
The acronym for "This Conversation Is Over". A great and courteous way to put finality on all your text messages, conversations, etc. A great new way to get the last word!
<Jules: txt to Claire> What time do you want to meet at the restaurant tonight?

<Claire: txt to Jules> 6:30 p.m. TCIO

Jules now knows that Claire is done with this conversation and will probably be away from her phone. The conversation has been given finality.
by Karen Owens January 11, 2006

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