The phrase "pure chaos" refers to a state or situation that is characterized by complete disorder, confusion and lack of organization. It implies an environment where there is no predictability, everything seems random and uncontrolled, and events seem to happen without any apparent pattern or logic. In other words, it's a scenario where the normal rules of society, nature or systems break down, leading to a sense of disarray, pandemonium and bedlam. The phrase is often used to describe situations that are highly stressful, overwhelming or frightening due to their unpredictable and chaotic nature.