An event that otherwise would not be especially remarkable, until having occurred with shit. Usually considered a surprise and unpleasant.
If an event occurs and involves a surprise shit and is not offensive, then it is a happenshit.
If you have a shart in the elevator of the building you work in, you might be saying, "I had a shitcident in front of the boss, now how am I going to win that promotion?"
If you found a bag of flaming dog shit at your front door, you might report the shitcident to your homeowners' association. ... I wouldn't if I were you, though. You probably deserved it.
When a cat can't make the catbox and is imitating Pollock on the walls with shit smears, you point and exclaim, "Is this fucking shitcident because of you, Mr. Pussy McFluffypants?!"
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”
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.