He couldn't stand their endless 'chatter' [='prattle'] about celebrities and movies.
He was 'chattering' [='jabbering'] away on a cell phone.
Children 'chattered' in the middle of the playground.
(..) but I was in the hallway, chatting up Penny. Really? You, Rajesh Koothrappali, spoke to Penny? Actually, I was less the chatter than the chat-ee. What did she say? Is she still mad at me? Well, she was upset at first, but probably because her sister shot somebody. (..)2007 TvShow: The Big Bang Theory Title: The Big Bran Hypothesis Season: 1 Episode 2