Fluff

Fluff is a video on the Poppy YouTube channel. It is the 355th video of the Poppy era. It was uploaded on December 7th, 2018.

Theme
The video consists of Poppy holding a jar of marshmallow fluff, repeatedly expressing fascination and exclaiming various adjectives describing the fluff. At one point, the jar of fluff appears on Poppy's head, to which she responds "how did that get there?".

The video is likely a play on the term "fluff", which is used to describe entertainment or writing that is perceived as trivial or superficial.