hoist by (one's) own petard

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hoist by (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. (Note: "hoist" in this instance is the simple past-tense of the archaic form of the verb, "hoise.") I tried to get my boss fired by planting drugs on him, but I was hoist by my own petard when the police caught me with them beforehand.
See also: hoist, petard
References in periodicals archive ?
Condemned forever to the back benches, hoist by his own petard, the hapless Fox hunted down by the pack.
But now Robin Cooper, in real life comedy writer Robert Popper, has been hoist by his own petard.
Hoist by his own petard, Tony Blair had set himself a high bar when he came into office, promising to be 'whiter than white'.
JUDGING from this evasive response to journalist's questions at the monthly Downing Street press conference at which he "repeatedly attempted to bat away the question of whether he wants to see Saddam Hussein hanged" (Daily Post, November 4), it is clear that much as he would like to see the extinguishing of Saddam as the beacon of continuing resistance to the illegal occupation of his country, Tony Blair has been hoist by his own petard over his own populist stance on capital punishment.
But in the end good sense prevailed and the man who made his name making fun of other people and their misfortunes was hoist by his own petard - which knowing what a weirdo he is, he'd have enjoyed enormously.
How right C H Williams (March 5) is when he writes that exchanges have indeed meant that more people could have an incentive to be dishonest - hoist by his own petard, methinks
Hoist by his own petard, I would venture to suggest
Few know what it means, but all of us know exactly what we mean when we say with very gad grammar: 'A pedant - like Mr Green - was hoist by his own petard.