Longman Dictionary of Contemporary English - chat

~1 n especially BrE an informal friendly conversation  (Drop in for a chat if you have an hour to spare this evening. | have a chat)  (We had a chat about the old days.)  (- see also backchat) ~2 chatted, chatting v especially BrE also chat away to talk in a friendly informal way, especially about things that are not important  (Danny and Paul chatted away like old friends.) + abou  (We sat in the cafй for hours chatting about our experiences.) + with/to  (Helen chatted with most of the guests at the party.) chat sb up phr v BrE to talk to someone in a way that shows you are sexually attracted to them  (We found Doug in the bar trying to chat up a waitress.)