Definition of birdbrain in English:

birdbrain

noun

informal
  • A silly or stupid person.

    • ‘The birdbrain concerned ignores the fact that people are complaining precisely because the pests are NOT leaving them alone.’
    • ‘Who wants a bunch of birdbrains running around in their game anyway?’
    • ‘Instead of being the classic pair of sweet-but-boring lovers, Hero and Philia are a pair of birdbrains - though Philia is a bit more backward than her boyfriend.’
    • ‘Next time you're tempted to call someone a birdbrain, remember you might actually be giving them much more credit than you intend.’
    idiot, ass, halfwit, nincompoop, blockhead, buffoon, dunce, dolt, ignoramus, cretin, imbecile, dullard, moron, simpleton, clod
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Pronunciation:

birdbrain

/ˈbəːdbreɪn/