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Idioms and Phrases with sitting on a powder keg

sitting on a powder keg

In imminent danger, in an explosive situation, as in Our office is sitting on a powder keg while management decides whether or not to close us down. This metaphoric term alludes to sitting on a keg of gunpowder that could go off at any moment. [First half of 1900s]

The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.