Brownian motion

noun3

1. •
   Random motion of particles suspended in a fluid, arising from those particles being struck by individual molecules of the fluid.
2. •
   Synonym of Wiener process.
3. •
   A state of chaos or disarray.

   • The sun was hot on my legs. I moved out of the doorway and stood in the room with my thoughts in Brownian motion. — 2003