Someone or something that has a fluffy texture.
"The kitten's fur was so fluffy that it felt like touching a cloud of white feathers."
Covered with fluff.
"The newly born kitten was so fluffy that its tail looked like a small white cloud."
A popular given name for a pet, often for a cat.
"My neighbor decided to rename her new kitten Fluffy because it was such a popular choice for pets."