noun, noun or participle which takes 'suru'
undressing; taking off clothes
Childish or playful word for undressing, often used by or to small children. Can be used as a noun or with する to mean 'to take off one's clothes'.
お風呂に入る前に、ぬぎぬぎしようね。
Let's take off our clothes before getting into the bath, okay?
子ども
The child said 'I'm gonna undress!' and started taking off their clothes by themselves.