freakish

adj

1. Resembling a freak.
2. Strange, unusual, abnormal or bizarre.

   “It was a realy freakish accident that claimed many lives.”

   “In all this series there is an almost freakish tendency toward the development of characters usually regarded as generic, as a result of which most of the genera have only one known species each.”

   “This was arguably a more emphatic win than that Old Trafford thrashing, without the freakish element and simply the result of City's vast superiority in all areas.”

3. Capricious, unpredictable.

   “What freakish weather we are having lately in these parts.”