Seppo
Australian SlangDefinition
Australian slang for an American, from rhyming slang “septic (tank)” for “Yank”; often mildly derogatory.
Examples
"He warned me that calling an American a 'Seppo' can sound rude."
"In Aussie banter, you might hear someone say 'a Seppo tourist,' but it’s best avoided."
"She explained that 'Seppo' comes from 'septic (tank)' rhyming with 'Yank' and means an American."