Shatsccident 

When you think you need to fart, but to your surprise (and disappointment) it turns out you needed to shit.

Grandad’s stomach was rumbling. I asked him “are you hungry? Your stomach is rumbling “. Grandad says “I can’t hear anything, it’s not me “. Suddenly grandad looks startled and says” I’ve got to go” and runs as best he can to the toilet.

I call out to Nanna. “Grandad has had a shatsccident”

Shatsccident by DirkJDiggler June 4, 2021

Shaccident 

Noun. When one mistakenly shacks (shares a bed/spends the night romantically, the act of sex isn't a shack requirement) with someone for an evening, whether it was a drunken mistake or turns ugly later. The term can be used to refer to the incident itself or the person shacked with.

I had a shaccident. I shacked with that guy, and now he's clingy like a parasite. OR That was a total shaccident. I didn't realize how ugly she was until this morning. OR He's a shaccident. I meant to shack with his friend instead. OR She's a shaccident. She was a terrible kisser.

Shaccident by Nerdpimp March 21, 2009

shitaccident 

When you forget to flush the toilet.

People were waiting in a long line to use the restroom and I realized I had a shitaccident because I didn't remember flushing the toilet.

shitaccident by NOVDEC September 7, 2013