[noun] [C] - a person who forgets things easily or does not think seriously about things, but is likeable despite thisI'm such a scatterbrain - I'm always leaving my umbrella behind.He likes to give the impression of being a bit of a scatterbrain, but he's actually extremely efficient and well-organized.
SCATTERBRAIN
Meaning of SCATTERBRAIN in English
Cambridge English vocab. Кембриджский английский словарь. 2012