be hoist with (one's) own petard

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be hoist with (one's) own petard

To be injured, ruined, or defeated by one's own action, device, or plot that was intended to harm another; to have fallen victim to one's own trap or schemes. ("Hoist" in this instance is the past participle of the archaic form of the verb "hoise.") I tried to get my boss fired by planting drugs on him, but I was hoist with my own petard when the police caught me with them beforehand.
See also: hoist, own, petard
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

be hoist with one's own petard

To be undone by one's own schemes.
See also: hoist, own, petard
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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