a piece of shit that is flung across a room at high speed and hits a fan and explodes on everyone.
dude wtf that shit grenade almost hit me!!
by harrison kass November 29, 2007
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When someone shits in the toilet and most of the poop ends up under the seat on the back of the bowl as poop shrapnel.
Chris went to make mud in the bathroom at work, and noticed that someone had pulled the pin on a shit grenade.
by PETR FITZWELL May 11, 2009
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