The type of conversation held with another person when you really do not wish to talk to them. It consists of short and to the point replies which do not add to the conversation and make it hard for the other person to continue. It is usually to try and convey politely that you do not have the time for this oxygen thief who insists on bothering you.
A typical nonversation goes as follows-
"So how are you today?"
"What have you been up to?"