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rattlebrain

American  
[rat-l-breyn] / ˈræt lˌbreɪn /

noun

  1. a giddy, empty-headed, talkative person.

Etymology

Origin of rattlebrain

First recorded in 1700–10; rattle 1 + brain

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

A poet is no rattlebrain, saying what comes uppermost and, because he says everything, saying, at last, something good; but a heart in unison with his time and country.

From Essays by Ralph Waldo Emerson by Turpin, Edna Henry Lee

It is safe for me, because I am nobody at all, and, moreover, I say whatever is in my thoughts, and am looked upon as a rattlebrain, and not taken seriously.

From An Enemy to the King by Stephens, Robert Neilson

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.