i've always called craps on what they're like:
The Ghost:
You know you've crapped. There's crap on the toilet paper, but no crap in the bowl.
Mexican Food Crap:
You'll know it's alright to eat again when your **** stops burning.
The Ring of Fire:
The kind of crap where you eat really spicy food and your **** feels like the inside of a cigarette lighter.
I personally hate the Ring of Fire.