Freakish

Freak·ish

Freakish

a.
  1. Apt to change the mind suddenly; whimsical; capricious.
    It may be a question whether the wife or the woman was the more freakish of the two.
    Freakish when well, and fretful when she's sick.
  2. rapidly changing and unpredictable; as, freakish weather.
  3. markedly abnormal.