Definition Of nut
a crazy or eccentric person.
I got up this morning and was moving around like a crazy nut .
a fruit consisting of a hard or tough shell around an edible kernel.
Rural people are allowed to collect medicinal herbs, mushroom and fungi, edible vegetables, wild nuts , and fruits from forests.
a small flat piece of metal or other material, typically square or hexagonal, with a threaded hole through it for screwing onto a bolt as a fastener.
It is a question that applies also to threads in metal, such as bolts and nuts and screw fasteners.
butt (someone) with one's head.
One of them grabbed my hand, so I pulled it away and he pushed me against a wall, and then he nutted me and I fell to the floor.
More affluent folks enjoyed nutting as recreation.
Example Of nut
A bolt was pushed through the hole and a nut was screwed on the end of it.
a football nut
As a self confessed car nut I was in my element examining pictures of Formula 1 cars and drivers, rally cars, scale models, trucks and bikes.
As far as I was concerned he was just some crazy nut who spent his days crooning up in the attic where he was changed.
Being a downhill ski nut and former instructor probably helps, but I think anyone can learn the basics of downhill skating and live to enjoy it.