a fruit consisting of a hard or tough shell around an edible kernel

he was cracking nuts with his teeth

a small flat piece of metal or other material, typically square or hexagonal, with a threaded hole through it for screwing on to a bolt as a fastener

fix the new pipe and tighten the nuts

the final wheel nut was tightened

a person who is extremely or excessively interested in or enthusiastic about a specified thing

a football nut

a person who is very foolish or irrational

she would have written me off as a time-wasting nut

a person's head

he's aiming to break a record by balancing a car on his nut

a man's testicles

butt (someone) with one's head

I thought he was going to nut me in the face

gather nuts

in autumn children would go nutting

they had nutted in the woods and fished in the river

the sky goddess, thought to swallow the sun at night and give birth to it in the morning

(in the UK) National Union of Teachers