What is the definition of Yorkshire Light Particles?

Yorkshire Light Particles are basically the spooky, invisible ghosts of radioactive iodine that somehow managed to escape from a nuclear reactor in the Yorkshire moors and decided to take a vacation on the wild side. They're like cosmic, radioactive, and utterly bizarre, wandering around, leaving a trail of health issues in their wake, and occasionally appearing in the form of peculiar, radioactive smudges on unsuspecting lambs.

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Edgy example sentence: "The Yorkshire Light Particles decided to take a dip in the nearby lake, leaving behind a radioactive smudge that turned the local wildlife into a mystery of 'where did it come from?' and left everyone questioning if they were just paranormal or just really bad campers."