Sentence:  ‘So, Adam, you have the privilege of being my first <WSD>Seppo</WSD>.' / ‘Your first what?' / ‘<WSD>Seppo</WSD>. You′ve gotta learn to speak Aussie, man. You′re a Yank, so –' / ‘No, not a Yankee. I′m from –' / ‘The "You Ess Ay". Makes you a Yank. Yank rhymes with septic tank. But we like to shorten names and then add an O at the end - but only if we like you. So Yank is kind of neutral. Septic tank is rude. But <WSD>Seppo</WSD>, well, it′s affectionate. Get it?' / ‘No.' 
Meaning of the word marked with <WSD> tags:  An American.