Traditional
Still common
Definition
American - from Septic tank meaning Yank.
Example Sentence
"He's a seppo on holiday."
Where "Seppo" Comes From
A layered piece of rhyming slang: "septic tank" rhymes with "Yank" (itself already slang for an American), and "seppo" is the shortened, "-o"-ified version of "septic."
It's rhyming slang built on top of another slang term, which makes it one of the more elaborate constructions on this list.
How Aussies Actually Use It
Used casually, and usually good-naturedly, to refer to an American — "he's a seppo on holiday" is more banter than insult, in keeping with the Aussie habit of ribbing just about everyone.
Context and tone matter, as with most nicknames for nationalities — it's generally lighthearted rather than hostile.
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