A petard is an archaic word for a bomb, before bombs were as big and destructive as they are today. The term “hoist by his own petard” means literally that some idiot blew himself up, kind of like this guy, except that in the classic example the bomb-wielder intends to damage something or someone else. The phrase is used to describe George Will’s condign justice,” meaning that a miscreant has reaped what he has sowed, received his just deserts, and “got what was coming to him,her, or it.”
In the future, when a nubbin asks, “Daddy, what does it mean to be ‘hoist by one’s own petard’?” the most vivid possible answer might be what is happening right now to the corrupt and Machiavellian Democratic Party and its corrupted allies. Exploding or soon to explode petards are everywhere.
An inventory (so far):
Ethics Alarms 