👉 "Older fluid" is like the great-grandma's swampy bath water that's been sitting in the tub for what feels like an eternity, but somehow still manages to make your toes tingle with a strange, unsettling warmth. Imagine this in an edgy example: "The old-fashioned oil used in the vintage car's engine had turned into an older fluid, so potent it could make your cat purr like it owned the place—or at least think it does."
Now, here's a bit unsettling: "The older fluid in the abandoned asylum's old hydraulic system was so viscous it could have powered a rusty old grille wrench, but it was also emitting an aura of forgotten nightmares."