What is the definition of Maintained Fluid?

A 'aintained fluid' is like a superhero's secret weapon, but instead of quips or flashy powers, it's an unstoppable substance that keeps everything smooth, like a perfectly lubricated rollercoaster ride. It's the kind of thing that keeps your joints from grumbling like a grumpy old tortoise on a treadmill.

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But let's not forget the darker side of this phrase. Here's a chilling example sentence: "The janitor's 'aintained fluid' was so disgustingly stagnant, it could've been a germ-spreading cesspool."