a rattlebrain.

Origin of rattlepate

First recorded in 1635–45; rattle1 + pate
Related formsrat·tle·pat·ed, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for rattlepate

Historical Examples of rattlepate

  • She was unquestionably what she had confessed herself to be—a rattlepate.

    The Wrong Twin

    Harry Leon Wilson

  • But whod ever have expected that rattlepate to think out everything as he has done?

    The Last of the Flatboats

    George Cary Eggleston