fuzz

noun

1. very loose, light particles of down, wool, etc.; fine hairs or fibers: the fuzz on a peach
2. a blurred, distorted audio effect deliberately produced when amplifying the sounds of an electronic musical instrument, as by overloading an amplification circuit
   also fuzztone

intransitive verb, transitive verb

1. to cover or become covered with fuzz
2. to make or become fuzzy