kookish
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kookish — [“kukijl mod. strange; eccentric. □ There’s a lot of kookish things going on around here. □ He is just too kookish. □ Who is the kookish one over there with the purple shades? … Dictionary of American slang and colloquial expressions
kookishness — noun The state or condition of being kookish; eccentricity, weirdness … Wiktionary