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birdbrain (to be a) [n]

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Meaning:
- Someone who is offensively stupid and their intelligence has not developed enough.
Examples:
- I’m really a birdbrain. If I hadn’t forgotten my ID card, I wouldn’t have missed the flight.
- You’re such a birdbrain for leaving the door unlocked!
- He was known as the village birdbrain, always coming up with half-baked schemes.
- The character was portrayed as a lovable birdbrain who always got into trouble.
- I locked myself out of the house again—what a birdbrain moment!
- You bought milk twice today? You’re such a birdbrain!
- Only a birdbrain would forget to double-check the client’s name on the proposal.
- He made a birdbrain mistake by sending the wrong email to the boss.
- You tried to put orange juice in your coffee? You’re a total birdbrain sometimes!
- Don’t forget your wallet again, birdbrain!
- You forgot your phone at home again? You’re such a birdbrain!
- Only a birdbrain would try to park in a no-parking zone.
- Stop daydreaming, birdbrain—we have work to do!