"Blackfellas" is a term used by some people in Australia to refer to Aboriginal and Torres Strait Islander people. These are the Indigenous people of Australia who have been living on the continent for tens of thousands of years before Europeans arrived.
They have their own unique histories, cultures, languages, and traditions. Sometimes the term "blackfellas" is used in a friendly way by Indigenous people themselves to describe each other, but it is important to remember that not all Indigenous people like this term or identify with it.
It is important to treat Indigenous people with respect and dignity, and to learn about their cultures and histories. It is important to inform ourselves about the challenges and injustices they face, and to work for a more just and equal society.