hoisted on one's own petard

Backfired plot victim

Hoisted on one's own petard means harmed by one's own scheme or weapon.

A petard was a small bomb used to blow open gates; being hoisted by one meant being blown up by your own explosive.

The phrase describes someone whose plot backfires: He tried to frame his rival but was hoisted on his own petard when the evidence pointed back to him.

Related

poetic justice · unintended consequences · best laid plans · siege warfare · hubris · too clever by half · folly · repercussions · shooting oneself in the foot · moral lessons · self-destruction · fall on one's sword · irony · karma · what goes around · downfall · reaping what one sows · taste of one's own medicine

Opposites
source of downfall

hoisted on one's own petardstabbed in the back

Treacherously harmed by trusted person

victimized · blindsided · sabotaged · ambushed · double-crossed

ironic justice

hoisted on one's own petardluck of the devil

Improbable repeated good fortune

landed on one's feet · slipped through the cracks · unscathed

Family

hoists, hoisting, hoisted, owners, petard, petards

Familiarity
Top 500,000
Profile
Used worldwide · Timeless · Everyday, not technical · Rated G