[Etymol. obscure: cf. COP sb.2 4.] A small heap, as of manure.
1825–79. Jamieson, Coop, a small heap, as a ‘coop of muck.’
1881. Gard. Chron., No. 411. 626. The raking of an adequate quantity of Oak and Chestnut leaves and carting them to the leaf-coop, with which to make up hotbeds, [etc.].
