Having the qualities of a scatterbrain: absent-minded, forgetful, easily distracted.
(informal) Silly or scatterbrained, usually of a woman.
lacking sense or discretion;
‘his rattlebrained crackpot ideas’; ‘how rattlepated I am! I've forgotten what I came for’;
silly or scatterbrained
‘don't tell me my ditzy secretary didn't send you an invitation!’;
‘he said I was too flighty to be a good supervisor’;