Separate hard lumps, like nuts:
You're lacking fiber and fluids. Drink more water and chomp on some fruits and veggies.
Sausage-shaped, smooth and soft:
Optimal poop! You're doing fine!
Watery, no solid piecs, all liquid:
You're having diarrhoea! This is probably caused by some sort of infection and diarrhoea is your body's way of cleaning it out. Make sure you drink lots of liquids to replace the liquids lost otherwise you might find yourself dehydrated!
Sausage-shaped but lumpy:
Not as serious as separate hard lumps, but you need to load up on fluids and fiber.
Soft blobs, with clear-cut edges:
Not too bad. Pretty normal if you're pooping multiple times a day.
Sausage-shaped but with cracks on surface:
This is normal, but the cracks mean you could still up your intake of water.
Fluffy pieces with ragged edges, a mushy stool:
You're on the edge of normal. This type of poop is on it's way to becoming diarrhoea.
Soft and sticks to the side of the toilet bowl:
Presense of too much oil, which could mean that your body isn't absorbing the fats properly. Diseases like chronic pancreatitis prevent your body from properly absorbing fat.