What is the definition of Challenges Fumes?

"Challenges fumes" is a playful mashup of "challenges" and "fumes," a phrase usually associated with exhaust fumes from a car engine. But let's not just stick to the literal meaning. Here's an unsettling example sentence: "The team's relentless challenges fumes were so potent, they could have powered a small army of pick-up trucks into oblivion."