Fluff bottom
When your dog or kitty is overdue for a grooming
The pooh is sticking to your pomeranian's butt! I think he has fluff bottom!
Bottom Fluff
When one breaks wind and the lint collected around the anus is blown out like a dandelion
Errol has a real bottom fluff issue at the moment, that lint is lingering around longer than the smell of her actual fluff, it’s terrible for my hay fever