Wiktionary
scatterbrains
n. 1 (plural of scatterbrain English) 2 A flighty, disorganized or forgetful person.
Usage examples of "scatterbrains".
The big wigs at the Octagon are scared silly that some scatterbrains will hear about such items as the matter converters and get all steamed up with man's oldest dream.
She expected she would marry one day-most women in the Two Rivers did-but she was not like those scatterbrains she heard going on about how they could hardly wait.