Fleabrain

noun

noun ·Uncommon ·Advanced level

Definitions

Noun

1
A stupid or foolish person derogatory, mildly

Synonyms

airhead bonehead changeling crackhead dicklick dildo

Antonyms

brain surgeon rocket scientist

Etymology

From flea + brain.

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