In standard Sinhala, it simply means "goods" or "things".
: The Telecommunications Regulatory Commission of Sri Lanka (TRCSL) has established Lanka Number Portability Services (Guarantee) Limited to manage the system. sri lanka badu numbers portable
When used in the context of people or "numbers," it is often a derogatory term for a girl or a woman. In standard Sinhala, it simply means "goods" or "things"