What is the definition of Hiking Fluid?

"A hiking fluid is like nature's own high-octane elixir - it's the secret ingredient that turns a leisurely stroll into a high-intensity workout, but in a way that's just as scenic and less likely to get you stranded in the woods. Now, here's an unsettling example sentence: 'The hiking fluid was so potent, it made the forest floor feel like it was about to erupt in a synchronized dance of panic.'"