Is there a specific term for this? A bit annoying or funny (depending on the day) when somebody does this. This happens especially on social occasions when people want to be funny. You say something and by the end of your sentence, they have an idea they want to share. I notice the eyes glazing and just KNOW they didn't actually listen. As a joke with myself, I kindly call them out on it and ask them to repeat the one thing I just said to them 5 secs ago. They can't do it. As if their brain can't handle having a thought and listening attentively until they can reply. The moment the idea pops into their head, their hearing is disengaged and they only wait for the end of the sentence to utter what they thought of. It's strange to me because I'm able to put my ideas in standby and let the person finish and pay attention to what is being said. Another one is the person who repeats a jokey line that wasn't funny multiple times, as if people didn't laugh because they did not hear it the first time. Usually done while speaking over somebody. Alcohol isn't particularly involved since this happens at the beginning of these events and even in the middle of the work day.