scatty
Concise Oxford English Dictionary © 2008 Oxford University Press:
scatty/ˈskati/
▶adjective (scattier, scattiest) Brit. informal absent-minded and disorganized.
– derivatives
scattily adverb,
scattiness noun.
scattily adverb,
scattiness noun.
– origin early 20th cent.: abbrev. of scatterbrained.
'scatty' also found in these Oxford entries:

