A nut case Meaning in English
expression
Definition
An informal way to refer to someone who behaves in a very strange, silly, or crazy way. It can be used both jokingly and insultingly.
Usage & Nuances
'A nut case' is very informal, even slightly rude; use with friends or for comic effect, but avoid in formal situations. Common in both 'a nut case' and 'he's such a nut case,' often about someone's unusual or extreme behavior. Can seem playful or mean, depending on tone and context. Not used for people with actual mental health conditions.
Example Sentences
My brother is a nut case sometimes.
basic
Don't listen to him—he's a nut case!
basic
That person yelling in the street is a nut case.
basic
Sarah comes up with the wildest ideas—she's a nut case in the best way.
natural
You bought a parrot and taught it to sing pop songs? You're a nut case!
natural
My friends think I'm a nut case for running marathons in winter, but I love it.
natural