👉 "Stupid fluid" is an informal term that refers to a substance that lacks the proper properties or characteristics of a typical fluid, often implying something that is confusing, ineffective, or simply not working as intended. It can describe a variety of things, from a poorly mixed solution that doesn't behave predictably to a liquid that is too viscous or too thin, making it hard to use in practical applications. Essentially, it's a term used when something fails to meet basic expectations or requirements, often due to poor formulation, mixing, or environmental factors.