Top definition
When you have to poop so bad but have nowhere to go so you poop in your pants.

Also: when you try to fart and you poop; also known as a shart

(Scat = poop) + accident = scatcident
Peter had to poop so bad, but was stuck in traffic and had nowhere to go so he had a scatcident.

Charlotte was in school and couldn't get to the bathroom fast enough and had a scatcident in the hallway.
by Bella James February 26, 2010
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