also: くっきー
noun
Colloquial loanword from English 'kooky', describing a person or thing that is odd, eccentric, or slightly crazy in a harmless way.
彼のファッションはちょっとクーキーだね。
His fashion sense is a bit kooky, isn't it?
あの映画、クーキーなキャラクターばかり出てくる。
That movie is full of kooky characters.
noun
Loanword from English 'cookie'; the spelling クッキー is far more common, but クーキー is also used.
クーキーを焼いたから、おやつにどうぞ。
I baked cookies, so please have some for a snack.