scatty       
adjective UK informal uk/ˈskæt.i/ us/ˈskæt̬.i/
 愚蠢的;没头脑的;傻乎乎的
silly and often forgetting things
  a scatty child 傻乎乎的孩子 
 scatty behaviour 愚蠢的行为 
 Synonyms: absent (NOT PAYING ATTENTION)absent-mindedabstracted forgetfulscatterbrained