WHEN SOMETHING GOES TERRIBLY TERRIBLY WRONG, OR BREAKS. USUALLY RUINS YOUR ENTIRE DAY AND MAY CAUSE SOME PEOPLE TO UNCONTROLLABLY SHIT THEIR PANTS.
TOM: WHERES YOUR BIKE?

ISHKEBIBEL: THE FUKIN THING SHAT THE BED LAST NIGHT, CAUSING ME TO DEFECATE IN MY PANTALOONS.
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a slang phrase that is often used to mean 'woke up early', the reasoning being that if you shat the bed you would get out of it asap.
-'shat the bed'?
-'nah couldnt sleep'
by Lucys_Drowning September 2, 2008
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To got up really early in the morning much earlier than you ususally would.
Man I Shat the bed today. I had to get up at 6am to catch the plane.
by Jaber the hut October 23, 2013
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