1. a person who chatters or talks persistently and often irritatingly about trivial matters
Usage: informal; chiefly British

Examples

• She's such a natterer; she never stops talking during meetings.
• The natterer at the party wouldn't let anyone else get a word in.
• He complained about the natterer sitting next to him on the train.
• My aunt is a terrible natterer who fills every silence with pointless chatter.
• The office natterer spent the whole lunch hour gossiping about coworkers.