What does chatterbox mean?
A chatterbox is a person who talks a great deal — often continuously, enthusiastically, and about matters of little consequence. The word is informal and carries a broadly affectionate, teasing connotation: calling a child a chatterbox suggests endearing liveliness, while applying it to an adult can shade toward mild criticism or exasperation. It functions as a countable noun ('she's a terrible chatterbox'), with the standard plural 'chatterboxes', and appears frequently in phrases like 'a real chatterbox' or 'such a chatterbox'. The term is built on the older word 'chatter', meaning rapid, casual, or idle talk, combined with '-box', a suffix used playfully to describe a person as though they were a container of something — as in 'jukebox' or 'music box'. Synonymous with words like 'talker', 'motormouth', and 'blabbermouth', it remains a common, vivid, and slightly humorous way to characterise excessive talkativeness in everyday English.
nounA person who talks a great deal, especially about trivial or unimportant matters; someone who is excessively talkative.
- A person who talks constantly, especially about trivial things.
"My grandmother was such a chatterbox that phone calls to her never lasted less than an hour."
"As soon as Priya arrived at the reunion she turned into a total chatterbox, moving from table to table without pausing for breath."
"The teacher gently asked the little chatterbox in the front row to let his classmates have a turn."
Regular plural; used when referring to multiple talkative people.
"The two chatterboxes at the next table kept us entertained all through lunch."
The '-box' suffix in 'chatterbox' treats the talkative person as if they were literally a box full of chattering — the same trick that gave us 'jukebox' and 'music box'.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of chatterbox
Chatterbox derives from the verb 'chatter', an old Germanic word imitating the sound of rapid, repetitive talk (and of birdsong), combined with '-box' as a playful agentive suffix describing a person as if they were a container holding that quality. It arose in English in the late eighteenth century, part of a broader pattern of whimsical compound nouns for talkative people. Its closest relatives are the other derivatives of 'chatter' itself — 'chatty', 'chit-chat', and 'chat' — all rooted in the same Germanic imitative stem.
How chatterbox is actually used
Informal and mildly humorous in register; usually affectionate rather than critical when applied to children or friends, but can be dismissive when used about adults. Common in British and American English alike. The plural is regular: 'chatterboxes'.
Easily confused with chatterbox
Chatter is the verb/noun for rapid, informal talking itself, while chatterbox specifically refers to the person who talks that way.