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chatterbox

American  
[chat-er-boks] / ˈtʃæt ərˌbɒks /

noun

  1. an excessively talkative person.

chatterbox British  
/ ˈtʃætəˌbɒks /

noun

  1. informal a person who talks constantly, esp about trivial matters

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of chatterbox

First recorded in 1765–75; i.e., person whose voice box chatters constantly

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.