Rattlebrain

noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    A rattlebrained person.

    "a genial young fellow enough to look at, and something of a rattlebrain, to all appearance."

Synonyms

All synonyms
foolharebrainrattleskullscatterbrain

Example

More examples

"a genial young fellow enough to look at, and something of a rattlebrain, to all appearance."

Etymology

From rattle + brain.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.