Verb: It's when you have a great big messy shit under the covers.

Noun: A big pile of wet shit stinking up the air trapped under a blanket*

*Dutch volcanoes have been observed in other enclosed spaces such as tents, sleeping bags, and, occasionally, entire vehicles.
"I Dutch volcanoed so badly it left a burn mark in the bed frame."

"The largest Dutch volcano on record is named Zuidwal and is located under the Wadden Sea in the Netherlands. The second largest Dutch volcano just shot out of my ass and into my sheets."
by bishsac January 21, 2022
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When a woman, or man, shoots semen out of the anus in the downward dog position.
John came in janes ass and she did a Dutch volcano all over johns face.
by Rob-tard July 1, 2010
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