The term "fuzz" has multiple meanings depending on its context.
1) In a general sense, fuzz refers to something that is soft and fluffy in texture or appearance, such as fur or feathers.
2) Fuzz can also refer to an indistinct or unclear image, often caused by poor reception or signal interference. For example, if you're trying to watch a TV show but the picture keeps "fuzzying" out, it means that the signal is weak and not clear.
3) In computer science, fuzz refers to a technique used in testing software for security vulnerabilities by inputting large amounts of random data or invalid inputs to see if the program can handle them properly. This method is often used to find bugs in programs before they are released to the public.