What is the definition of Kde Fumes?

Kde fumes are the delightfully toxic, yet utterly innocuous, byproducts of a very questionable spa treatment or a poorly cooked burger that's been sitting in the sun too long. Picture this: "After the 'Kde Fumes' sauna session, I couldn't help but mutter to myself, 'Did I just inhale the essence of a burnt steak and a forgotten room?'"

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Now, here's an unsettling example sentence: "The abandoned mine shaft, once a playground for geologists, now exudes 'kde fumes' that could make your skin crawl and your existential dread grow stronger than a vulture's stomach!"