What is the definition of Opened Fumes?

"Opened fumes" is a phrase that humorously describes the act of letting something, usually a chemical or a toxic substance, escape its container, causing an explosion of unpleasant odors. It's like opening a Pandora's box, but instead of jewels, you've got a cloud of stinky surprises.

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Now, here's an unsettling example sentence: "The janitor, in his haste to open fumes from the new incense burner, unleashed a stench so potent, it could've made the moon blush and perhaps convinced the vampire in the attic to open its secret passage."