This noun refers either to a heap of manure or dung (a dunghill) or to manure used for fertilizing. Luke 13:8 uses it in the parable of the barren fig tree: the gardener asks to leave it one more year, 'and I will dig around it and put manure (κοπρίαν) on it.' Luke 14:35 uses it in Jesus' saying about salt losing its saltiness: it's fit neither for soil nor for the manure pile (κοπρίαν). The word can refer to refuse heaps in general (where foundlings might be abandoned, per classical usage) or specifically to agricultural fertilizer. Jesus' usage is agricultural and practical.