綿わたぼこり

noun

fluff; lint

Clumps of fabric fibers, often found on clothing or in dryers.

• セーターに綿わたぼこりがたくさんついている。

  There's a lot of fluff on the sweater.

noun

dustball; ball of dust

A small, roundish accumulation of dust and fibers, often found under furniture.

• ベッドの下したに綿わたぼこりがたまっていた。

  Dustballs had collected under the bed.