† hard-dirtn.Obsoleterare broken bricks, rubble, or other solid waste material; cf. hardcoren. 1.
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1851 H. MayhewLondon Labour II. 281/1 ‘Hard-dirt’, or ‘hard-core’, consisting of the refuse bricks, chimney-pots,..broken bottles,..oyster-shells, &c., which form part of the contents of the dustman's cart.