chatterbox

A chatterbox is a person who tends to use a whole lot of words without having much of anything to say. If you're constantly whispering to your friend during math class, your annoyed teacher might call you a chatterbox.

The informal word chatterbox is the perfect term for the annoying, incessant talker you always seem to end up sitting next to on long plane trips. Chatterbox dates from the 1770s, a combination of chatter, an echoic or onomatopoeic word, and box, giving chatterbox the sense of "a box or container full of idle chatter."

Definitions of chatterbox
  1. noun
    an obnoxious and foolish and loquacious talker
    synonyms: babbler, chatterer, magpie, prater, spouter
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    type of:
    speaker, talker, utterer, verbaliser, verbalizer
    someone who expresses in language; someone who talks (especially someone who delivers a public speech or someone especially garrulous)
  2. noun
    orchid growing along streams or ponds of western North America having leafy stems and 1 greenish-brown and pinkish flower in the axil of each upper leaf
    synonyms: Epipactis gigantea, giant helleborine, stream orchid
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    type of:
    helleborine
    any of various orchids of the genus Epipactis
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