A racist term for an Indiginous Australian (Aboriginal). It is often refered in accordance to other racist terms and idioms that often revolve around an Aboriginal getting high from breathing in the fumes of petrol, paint and other strong chemicals.
It is also used as a common nickname for the aboriginal race as it is deemed more appropriate by white people to use noonga than boong, or abo. This however is entirely false as it is still a racist term.
You fucking black petrol sniffing fat fucking noonga.