What is the definition of Oxide Fumes?

Oxide fumes are like the secret sauce of a bad sci-fi movie, except instead of being magical, they're just super-irritating and toxic gas clouds that make you want to cringe and say, "Whoa, did someone set up a new version of Smog Alley?"

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Here's a chilling example sentence: "The scientist's lab was riddled with oxide fumes so potent, it nearly convinced the local cats to start a revolution for better air quality."