0 comments Meaning of 'Seppo' SepponounAn American. Shortened form of 'septic tank', which is rhyming slang for 'Yank' (an American).Example of 'Seppo'There's nothin' on the box except the usual seppo crap.Spread the love, share the slang! Gidday mate, shout us a beer if you enjoyed our bonza website!
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