a device contrived to hurt another person; boobytrap; an explosive contraption used in warfare to blow in a door or form a breach in a wall.
to "hoist by one's own petard" means you have been hurt or caught by the very device that you intended to hurt someone else. This phrase is often used mockingly, as if to say that you stepped in your own mess.
by Dr. Dave January 8, 2004
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A portmanteauof "retarded" and "petard," it describes a plan backfiring on you in such a way that you are left looking utterly ridiculous. It combines the concept of retarded--which is to say mentally deficient--and the phrase "hoisted by your own petard," which means to have damage done to you by the means you had intended to employ to damage others. A petard is an explosive used to break down barricades in warfare, and so petarded can also mean "blown up," in some circumstances.
You ratted Dan out for stealing that camera, but in doing so proved that you were his accomplice? Dude, you're petarded.

Jim just petarded the front door trying to take out his ex, but the door blew up and a shard of it went through his windshield. Totally petarded.
by Talmanes December 2, 2006
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An acute use of the word Retarded. Retarded to the second power. Pretty Retarded.
"Did you see that guy giving me those ridiculous pick-up lines?"

"Yeah, he was petarded!"
by instrumentoffear March 24, 2009
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A nasty and insulting word for members of PETA, an animal-rights terrorist organization. They are usually destroying property or protesting at McDonalds.
An idiot PETArd threw paint on my fur coat, so I sued her for over a million dollars and won.
by weirdgirl June 18, 2003
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Derogatory term for one who belongs to PETA. See also terrorist.
Those PETArds are protesting outside the Outback Steakhouse again. Should I dump the T-bones on them, boss?
by SiliconHero April 25, 2003
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Medieval demolition. Set down by people, and then the person runs. In many cases, the person may fail to run, therefore they have been "blown away by their own petard", which is also a common saying.
Petard is nothing to do with retard. You are retarded, not petarded. :P
by Steaver370 July 30, 2004
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