The story
Blend of cognition + hazard, likely coined and popularized by the SCP Foundation wiki.
Etymology from Wiktionary, CC BY-SA 4.0.
cognitohazard
cog·ni·to·haz·ardToday it means: A sensory signal (such as an image or sound) that directly causes harmful or undesired physiological effects to one who senses or perceives it. Full definition →