Fuzz ball

from The Collaborative International Dictionary of English v.0.48

Fuzz \Fuzz\, n. [Cf. Prov. E. fuzzy that ravels (of silk or
   cotton), D. voos spongy, fungous, G. faser filament. E. feaze
   to untwist.]
   Fine, light particles or fibers; loose, volatile matter.
   [1913 Webster]

   {Fuzz ball}, a kind of fungus or mushroom, which, when
      pressed, bursts and scatters a fine dust; a puffball.
      [1913 Webster]