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Thank you so much. It's very New Zealand culturally and that worried me.

It rings true for America too, at least the America I grew up in. Drunk uncles these days might not make the same word choices they did thirty or forty years ago.

the truth is that's a story about my father at a family Christmas party in the 70's

That’s interesting. It could definitely be modern too, but it struck me as having a seventies point of view and way of speaking in it.