Seppo Australian English An American. The word is abbreviated rhyming slang for “septic tank” and “Yank.” A septic tank is a place where human waste is stored after using the toilet. Septic tanks remain common in many parts of rural Australia. Seppo can be either derogatory or affectionate depending on the context in which it is used. 日本語 アメリカ人。Seppoは、septic tankの省略であり、Yankの押韻俗語でもある。Septic tankは、汚水処理タンクのこと。Seppoは、使い方や文脈によって軽蔑的なことになるか親しみを示す表現になる。 Plain English An American, a Yank. Strine Dictionary Related posts: Strine Dictionary The Strine Why Atorkin: Natchrule Strine Japanese Government Ministries & Agencies/政府省庁ウェブサイト The Strine Why Atorkin: Plain English Powered by YARPP.