Meaning of “be hoist(ed) with/by your own petard” in the English Dictionary

british dictionary

"be hoist(ed) with/by your own petard" in British English

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be hoist(ed) with/by your own petard

formal

to suffer harm from a plan by which you had intended to harm someone else

(Definition of “be hoist(ed) with/by your own petard” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

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