A bog of a deep brown to dark black colour, typically composed of heavy, compact material; land consisting of such a bog; frequently contrasted, especially in Ireland, with red bog.
Origin
Mid 18th century.
Definition of black bog in US English:
black bog
noun
historical
A bog of a deep brown to dark black colour, typically composed of heavy, compact material; land consisting of such a bog; frequently contrasted, especially in Ireland, with red bog.