Always firm (or it would be called a 'poop toothpaste' or a 'poop ribbon', it is usually deep chocolate brown in color and highly aromatic in a thoroughly barfulated manner.
It is sometimes used as a name of deep affection or admiration.
I have contributed many poop nuggets to the local ecology.
Oy, there's a poop nugget in my socks!
You are quite a poop nugget, Mr. President.
(In French accent like Pepe LePew) Mah darleeng, you are such a beautiful poupe nougat! I am mahd for you, ma petite poopoux!