WordReference Random House Learner's Dictionary of American English © 2026
bird•brain /ˈbɜrdˌbreɪn/USA pronunciation
n. [countable] Slang.
WordReference Random House Unabridged Dictionary of American English © 2026- Slang Termsa stupid or scatterbrained person.
bird•brain
(bûrd′brān′),USA pronunciation n. [Slang.]
bird′brained′, bird′-brained′, adj.
- Slang Termsa stupid, foolish, or scatterbrained person.
- bird + brain 1920–25