When one, particularly a younger person, ends every phrase and sentence as if it were a question. This practice could be derived from the "valley girl" excuse for talking during the nineties, but many people still do it today out of uncontrollable habit.
An expression that's used when you want information from someone, but that someone keeps telling boring details you don't need to know.
Can be emphasised by using 'Shut the fuck up and keep talking'.
Guy 1: So we went to her bedroom, and there were a lot of dolls there. She also had a poster of-
Guy 2: Dude, shut up and keep talking. Did anything happen?