kook
word
Definition
A 'kook' is an informal word for someone who is odd, crazy, or acts in a very strange or eccentric way.
Usage & Nuances
'Kook' is informal, sometimes slightly insulting, but can also be playful. Often used for someone whose ideas or actions seem strange or very different from the norm. Not used for dangerous craziness. Common in American English, less so elsewhere.
Example Sentences
Everyone thinks the old man is a kook because he talks to his plants.
basic
My uncle is a real kook, but he's fun to be around.
basic
Some people called her a kook for believing in aliens.
basic
Don't listen to him—he's just a harmless kook with wild theories.
natural
You always need at least one kook at the party to keep things interesting.
natural
The internet is full of kooks sharing strange ideas.
natural