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mixup
A cordial mixed with water to make a drink. Not known if one word or two: There is some cold mixup in the frige to drink.
Contributor's comments: I grew up in the Illawarra and moved to the Upper Hunter some 9 years ago. I began to hear the term mixup being used occasionally. Curiously, the only people who have used this expression for what I've always known as "cordial", have lived in Cessnock.