a. [f. FREAK sb.1 + -Y1.] = FREAKISH.
1824. Blackw. Mag., XV. April, 453/2. Instead of light woods and clipsome hedges and freaky meadows his faded eye could only fall upon horrid bars and walls. Ibid. (1891), CXLIX. Jan., 107/2. Theodora was was not anywhere in particular, and she wasnt clever or pretty, only a slippery, freaky little creature, without any marked individuality.
Hence Freakiness.
1886. T. Roosevelt, Hunting Trips, 347. No other species seems to show such peculiar freakiness of character, both individually and locally [as the antelope].