coat, noun
colloquial. Elliptical for blue-coat sense 2.
1949 H.C. Bosman Cold Stone Jug (1969) 37I been brought up on a farm. And I smoke dagga. And I been twice warned for the coat. And if I was brought up in a city, where would I be to-day, I’d like to know? And the Bombardier says I would be a criminal, most likely.
Elliptical for blue-coat sense 2.

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