Top Definition
An incredibly solid and hard surfaced stool that causes pain when excreted. Often the 'birther' will have to raise his buttocks off the seat,pause to regain breath and pushing power before continuing to heave the beast out.
Gregory's excellent John Wayne walk was partly attributed to the wince inducing Steel Birth he produced in May of '94 and still brought a tear to his eye on recollection.
by Ralism July 23, 2011
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