The poop where your stomach cramps up before it happens. When you go to poop, at first it's like the head of an arrow, it's hard and extremely painful to push out the 2 to 4 solid pieces of feces. After the "dam breaks" A flush of liquid-like poop flies out, thus being the sloppy wooden part of the arrow. So the poop is known as a "Sloppy Arrow"
Dude, I was totally about to get it in when I had really bad stomach cramps! As soon as I felt it, I knew I had a Sloppy Arrow, and I was going to be in the bathroom shitting liquid for hours!