slag heap

British  

noun

1. a hillock of waste matter from coal mining, etc

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Example Sentences

Beside it a sprawling slag heap juts into the sky, offering a high point overlooking the city of Avdiivka and surrounding villages.

From New York Times

Are we using our sky as a giant slag heap, the magazine’s readers wondered, the air filled with carbon dioxide just as coal tar had clogged up the rivers?

From Slate

Gorman speaks for a generation that simply wants the chance to bloom and blossom yet was born in the slag heap of the failed decisions of generations past.

From Washington Post

Huge white lettering spelling out the name of the north Wales town was spotted on the slag heap at Bersham Bank colliery tip, near Rhostyllen.

From BBC

They decided to take a closer look and travelled up to the slag heap where it currently stands.

From BBC