"KISS" stands for "Keep It Simple, Stupid." It's a design principle that emphasizes simplicity in problem-solving, engineering, and product development. The idea is to avoid unnecessary complexity and keep solutions straightforward, as simpler systems tend to be more reliable and easier to understand and maintain.
Though the phrase uses the word "stupid," it's not meant to be insulting; rather, it suggests that over-complicating things can lead to mistakes or confusion. The KISS principle is commonly applied in various fields, including software development, engineering, and even business, to prioritize simplicity and efficiency.