When someone is focusing on something else while youre telling a story and they realize youre talking, in the middle of your story they say " wait what were you saying? sorry i wasnt listening" pretty much sending the message that theyre not interested in what you have to say or theyre busy and they dont have time to talk.
Daniel: man today my teacher was talking about his mom, and then missy was like 'what about your dog?' and he was like well his name is..
Nicki: Im sorry what? i wasnt listening
Daniel: Damn, you just conversation incremulated me!