What is the definition of Alone Fumes?

Alone fumes are the byproducts of a person's inner monologue when they're left to themselves, literally or metaphorically. Imagine this: "After years of binge-watching reality TV and avoiding social interaction, John's alone fumes were so potent, they made the couch snore." This is a cheeky way to describe the overwhelming, negative thoughts that can set in when someone is truly on their own, but it's also a bit unsettling when you think of someone in such a state.