Taken from "Hoisted by his own petard" (Petard is some 16th century shaped charge for breaking into fortresses. If the bomb goes off while the French guy is installing it on the wall, he is then hoisted by his own petard). So when you or someone has plans or an occupation or way of doing things that blows up in their face or defeats their own purposes, they are then, petarded. Especially fun if you can't use the 'r' word in certain company...
He tried showing off by rushing through but he just screwed up spectacularly and now he's soooo petarded.
a condition of being a complete petard; dumb
Example:
Your friend: My brother suffers from petardism, he’s such an idiot.
You: Omg! that’s crazy
a condition of being a complete petard; dumb
Example:
Your friend: My brother suffers from petardism, he’s such an idiot.
You: Omg! that’s crazy