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a device found on most newer lawn mowers that will shut the mower off if you let go of the handle so as to prevent some idiot from sticking their hand under a lawn mower while it is running, a similiar device found on a snow blower or other gas powered equipment
The thing I hate about mowing the lawn is when you take your hand off the idiot bar for just a second to move something out of the way and you have to restart the mower.
by Michael_Hunt May 18, 2008
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The bars in front of high windows or outside doors or in inexplicable places to prevent idiots from doing something stupid.
Dudette- Did you hear about the drunk guy who almost fell out of the top floor window?

Dude- Yeah, thank fuck for those idiot bars
by DaveKurtandFaye July 01, 2010
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