FREAKISH
bizarre, eccentric, freakish, freaky, flaky, flakey, gonzo, off-the-wall, outlandish, outre
(adjective) conspicuously or grossly unconventional or unusual; “restaurants of bizarre design--one like a hat, another like a rabbit”; “famed for his eccentric spelling”; “a freakish combination of styles”; “his off-the-wall antics”; “the outlandish clothes of teenagers”; “outre and affected stage antics”
freakish
(adjective) characteristic of a freak; “a freakish extra toe”
capricious, freakish
(adjective) changeable; “a capricious summer breeze”; “freakish weather”
Source: WordNet® 3.1
Etymology
Adjective
freakish (comparative more freakish, superlative most freakish)
Resembling a freak.
Strange, unusual, abnormal or bizarre.
Capricious, unpredictable.
Source: Wiktionary
Freak"ish, a.
Definition: 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. L'Estrange.
Freakish when well, and fretful when she's sick. Pope.
– Freak"ish*ly, adv.
– Freak"ish*ness, n.
Source: Webster’s Unabridged Dictionary 1913 Edition