Impertinent (adjective):
1 - Intrusive or presumptuous, insolently rude; uncivil
2. Not relevant; irrelevant: an impertinent detail.
3. Inappropriate, incongruous, or absurd (of facts or ideas)
4. Trivial, silly, or absurd (of people)
i.e. a callow, impertinent youth.
The examples always refer to a 'youth' and have two adjectives.
"A saucy impertinent youth"
"An indolent, disrespectful youth"
"An idle, insolent youth"
etc.
