noun which may take the genitive case particle 'no', noun
Describes a young person acting overly confident or impertinent, often in a way that is typical of their age. Used for children or teenagers who talk back or act superior.
あの子は生意気盛りで、すぐ口答えをする。
That kid is at a cheeky age and talks back right away.
I'm having trouble with my brash little brother.