Bog butter

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a hydrocarbon of butterlike consistence found in the peat bogs of Ireland.

See also: bog

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
The body is the latest in a number of discoveries made in the same bog over the last number of years which includes bog butter, leather shoes and axe heads.
New York, May 3 (ANI): A wooden vessel containing bog butter, thought to be 5,000 years old, dating from the Iron Age, was found buried in an underground store in Ireland.
Joe Clancy and his nephew Brian found over 100 pounds of the ancient "bog butter" buried, as a form of refrigeration, in Ballard bog on the outskirts of Tullamore, County Offaly, as they were cutting turf.