Acting like a total kook — weird, eccentric, or a little unhinged in a charming or harmless way. Kookish describes someone whose ideas, behavior, or vibe is delightfully off-center without being dangerous. It's gentler than calling someone crazy and more affectionate than calling them strange. You might use it for the neighbor who collects garden gnomes obsessively or the coworker who brings homemade crystals to every meeting.
She has some kookish theories about moon cycles affecting her sleep, but honestly she's never wrong about the weather.
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(slang, chiefly, US) Like a kook; eccentric.
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Regional slang from around the English-speaking world — British, Australian, Irish, Caribbean, Nigerian, Filipino, AAVE, and the hyphenated-English dialects that make the internet sound local.
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