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IQ-fluid (adj.): Describing a person whose effective intelligence and cognitive performance fluctuate significantly over extended periods of time — typically weeks, months, or longer — rather than just day-to-day. During high phases, they display very high-IQ traits like sharp reasoning, creativity, quick learning, and strong problem-solving. In low phases, performance drops noticeably with brain fog, slower thinking, and poorer decision-making. These longer-term shifts can be influenced by nootropics, supplements, lifestyle changes, hormones, stress, mental health, or environmental factors. The term highlights real cognitive variability that traditional IQ tests (designed to measure stable traits) often don't capture.
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