How do you say boy baby in Malayalam?

There isn't a direct translation for "boy baby" in Malayalam. You could use the following phrases:

1. "കുഞ്ഞു പയ്യൻ" (kunju payyan): This translates to "little boy" and is the most common way to refer to a baby boy.

2. "ആൺ കുഞ്ഞ്" (aan kunnj): This translates to "male child" and is more formal.

3. "പുരുഷ കുഞ്ഞ്" (purusha kunnj): This translates to "male baby" and is also formal.

The choice of which phrase to use would depend on the context and formality of the situation.