Here are some possible interpretations:
* A playful term of endearment: When said with a lighthearted tone, it might simply be a way to describe a boy who is energetic and full of life.
* A playful reprimand: It could be used to playfully tease a boy for being too loud or disruptive, especially when his behavior is causing inconvenience or annoyance.
* A negative description: If used in a more serious or angry tone, it could be a criticism of a boy's behavior, suggesting that he is disrespectful, inconsiderate, or lacking self-control.
The specific meaning of "noisy boy" will depend on the situation and the tone of voice used.
It is important to consider the context when interpreting this phrase, as it can have different meanings depending on the speaker and the situation.