Adjective scatty has 2 senses
  1. rattlebrained, rattlepated, scatterbrained, scatty - lacking sense or discretion; "his rattlebrained crackpot ideas"; "how rattlepated I am! I've forgotten what I came for"- Glenway Westcott
    Antonym: wise (indirect, via foolish)
  2. absent, absentminded, abstracted, scatty - lost in thought; showing preoccupation; "an absent stare"; "an absentminded professer"; "the scatty glancing quality of a hyperactive but unfocused intelligence"
    Antonym: attentive (indirect, via inattentive)
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