When you're afraid of something out of sudden
Take this example:
One of my friend and I were walking along the street when a cat jumped out of garbage and we did crap ourself.
I shot a cat that did crap itself.
I'll show you a movie that I'm pretty sure you're gonna crap yourself, honey.
Dingles of crap. Left behind despite 4-5 wipes with toilet paper. Usual problem with hairy arses.
I was humping her in the missionary position but I couldn't cum, I kept losing my erection. So I asked her to turn over so I could do it doggie style, and hold the base of my shaft. She put her head down on her crossed arms, and her ass up, but then I could smell her crap dingles too well !
A chute that carries only crap. No matter what, the only thingcoming out of that chute is crap. Used to describe a situation which can only result it a crappy outcome.