Definitions for "Scatterbrained"
lacking sense or discretion; "his rattlebrained crackpot ideas"; "how rattlepated I am! I've forgotten what I came for"- Glenway Westcott
absent-mindedly irresponsible; "he said I was too flighty to be a good supervisor"
Keywords:  giddy, dizzy, see
See: DIZZY, GIDDY.