Definition of a whittling fuzzy: Fine slivers of wood left in the bottom of knife cuts. They can appear when slicing up to a stop cut, and when removing a chip that is formed at the intersection of knife cuts.
I also need to say again, that I am no expert wood carver. In fact I've only been whittling and carving for about 8 or 9 years. I am still learning, and discovering, and yes, making mistakes. I hope I'm not coming across as a know it all. I'm just sharing some of the things that I run across on my whittling and carving journey. Hopefully you can pick some morsels from these posts that you can use.