"That kid's a real ratbag, always up to something."
Where "Ratbag" Comes From
"Ratbag" emerged in Australian and British slang in the early 20th century, literally evoking the image of a "bag of rats" — chaotic, unpredictable, a bit of a mess.
Australia developed the word in two directions at once: as a harsh label for a genuinely unpleasant or unreliable person, and as a warm, teasing term for a lovable troublemaker, especially kids.
How Aussies Actually Use It
Context and tone do all the work with "ratbag" — said with a laugh about a cheeky child or a larrikin mate, it's affectionate; said flatly about someone's behaviour, it can be a real criticism.
"Old ratbag" is a common, fond way older Australians refer to a long-time mischievous friend, similar to how "you old bugger" gets used.
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