harebrain
Moby thesaurus: birdbrain, crackbrain, crank, cuckoo, ding-a-ling, featherbrain, featherhead, flibbertigibbet, giddybrain, giddyhead, kook, lunatic, nut, rattlebrain, rattlehead, rattlepate, scatterbrain, scatterbrains, screwball, shallowbrain ... show more.
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