What does billy mean in Australian slang?

1. Tea: When someone says "billy" in Australia, it usually refers to a tin container used to boil water for making tea. The term is commonly used as "put the billy on" or "boil the billy," which means to prepare tea.

2. Kettle: In some parts of Australia, "billy" can be used as a synonym for "kettle," which is a kitchen appliance used to boil water.

3. Police Officer: In Australian slang, "billy" can also refer to a police officer. It's an informal way of addressing or describing a law enforcement officer.