Source : WordNet®

scatty
     adj 1: lacking sense or discretion; "his rattlebrained crackpot
            ideas"; "how rattlepated I am! I've forgotten what I
            came for"- Glenway Westcott [syn: {rattlebrained}, {rattlepated},
             {scatterbrained}]
     2: lost in thought; showing preoccupation; "an absent stare";
        "an absentminded professer"; "the scatty glancing quality
        of a hyperactive but unfocused intelligence" [syn: {absent},
         {absentminded}, {abstracted}]