pull the plug on
Idioms-
Discontinue, end, as in The government pulled the plug on that program . [First half of 1900s]
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Remove all life-supporting equipment, as in The family debated whether it was time to pull the plug on him . [Second half of 1900s] Although this idiom undoubtedly alludes to cutting off electricity to an electrical device, it originally referred to the removal of a stopper that flushed an old-style toilet.
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.