conversational auto pilot 

when you either dont give a shit about what someone is trying to talk to you about, or you are busy doing something else to pay any attention to them

an example of conversational auto pilot is when you respond to someone with short answers that in no way carry the conversation.

haha, nice, wow, thats gay, what the heck,

conversational auto pilot by murad burrito May 12, 2011

conversationist 

someone who is quite good at creating a conversation

Jordian is quite the conversationist

conversationist by timmytheretard22 January 3, 2014

conversational sponge 

Someone who listens to a conversation but never contributes

Jenny is such a Conversational Sponge! I want her to say something!

conversational sponge by iwinalot7 February 9, 2015

Conversational Probe 

when your doctor gets chatty during a prostate exam

Lou had his annual physical, and after fasting he was in a very grumpy mood. when his doctor got to the point of "the finger", Lou felt him fishing around up there like he lost his keys. "so how the kids doing? everybody good? hmm... does that hurt" the doc asked during a very Conversational Probe. Lou thought to himself, "you have your finger in my ass what do u think dude"

Conversational Probe by Uncle Joosie October 16, 2021

conversational decay 

Conversational decay refers to the amount of time it takes for a conversation with a stranger to die down to stagnation.

In-person:

Let's say you met someone from your class or work for the first time and start talking about mutual interests, the decay of that conversation wouldn't be as quick. Therefore, it's reasonable to state that the conversational decay would be somewhere between 30 minutes to an hour.

Online:

If you meet someone on Discord for the first time and start a regular conversation with them, it is estimated that it may take between 1 minute to a few weeks for your conversation to completely stagnate with them.

The person Harry matched up with on Bumble seemed pretty promising but, the conversational decay was under 10 minutes.

conversational decay by Tobio Mark January 14, 2023

multi-conversationalism 

having multiple small conversations simultaneously within the same sentence or message.

example of multi-conversationalism question and answer~

friend 1: "How was your day, what's on your mind, do you like italian food?"

friend 2: "Same old boring, nothing much, I prefer chinese."

multi-conversationalism by Stormold January 26, 2010

iconversation 

a conversation by IM, SMS, BBM or email that consists mostly or entirely of emoticons.

Here's as example of an iconversation:

Diane: \o
Marik: \o
Diane: :-)?
Marik: :-)! :-)?
Diane: :-(
Marik: ???
Diane: </3
Marik: :-(!
Diane: :'(
Marik: ({})
Diane: :-)
Marik: ?!
Diane: !
Marik: o/
Diane: o/

iconversation by karbyn March 29, 2010