In Australian colloquial language, "dunny" is itself the traditional slang term used to describe an outside toilet, outhouse, or an ordinary indoor bathroom facility. Australians historically used words like "loo," "bog," or "dunny" interchangeably in informal settings. Therefore, "dunny" is not something that requires another slang term, as it functions directly as the primary Australian slang descriptor for a restroom or lavatory across rural and urban environments.