rattlebrain

[ rat-l-breyn ]
See synonyms for rattlebrain on Thesaurus.com
noun
  1. a giddy, empty-headed, talkative person.

Origin of rattlebrain

1
First recorded in 1700–10; rattle1 + brain

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024