[verb] [T] [informal]To brain someone is to hit them.I'll brain you if you don't keep quiet. -brained [suffix]These dinosaurs were large-brained and more intelligent than most.(disapproving) -brained is used in various phrases to describe someone as stupid or badly organized.bird-brainedharebrainedscatterbrained
BRAIN
Meaning of BRAIN in English
Cambridge English vocab. Кембриджский английский словарь. 2012