An autism related event involving a child, poop, and typically the walls, carpeting and often the child him/herself. First used in this context by a mom of three kids with autism who also happens to write.
From a Huffington Post Piece: "What is a crapisode? (This is where you might want to stop eating and put down your beverage.) My 10 year old (#2, appropriately for the purposes of this entry) pooped in the toilet. That is reason to cheer, believe me. Toilet training is a major issue in my section of the autism community. Our kids can wear diapers into their teens and beyond. So #2 pooped. Hooray! But #2 forgets to flush. And she rarely closes the lid. Not hooray.
Miss Peanut, my 6 year old, seems to believe that being a Virgo means she simply MUST swim in any puddle larger than spit. The toilet is like an Olympic sized pool to her. So Peanut goes into the toilet after #2 has had her, ah, success. Peanut flings kaka everywhere and gets it all over herself, the floor, the walls, the tub, the baseboards and the window. Wes Craven could not film anything scarier than what I saw that school morning, 35 minutes before the bus was due to arrive. That’s a "crapisode." It happens in the blink of an eye while I’m washing dishes or doing laundry. I’m alerted by a splashing sound that drops a brick into my stomach. #2 doesn't understand to flush and close the lid. Miss Peanut doesn't realize that a face full of feces is rarely considered a way to amuse oneself outside of the fetish community."