A conversation in which two or more people talk for hours, discussing everything under the sun, and yet some of the topics were so random and pointless that it seems like they talked for hours about nothing. These are usually the most interesting and entertaining conversations.
Girl 1: He called me last night.
Girl 2: What did you two talk about?
Girl 1: Oh, we talked about everything and nothing. I wouldn't know where to start.
Girl 2: Cool.