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English definition of “birdbrain”

birdbrain

noun [C usually singular]     /ˈbɜːd.breɪn/ US  /ˈbɝːd-/ mainly US informal
a stupid personStupid and silly people birdbrained     /-breɪnd/ adjective mainly US informal stupidStupid and sillyOf unsound mind
(Definition of birdbrain noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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