What is the definition of Swap Blood Cells?

Swapping blood cells is like playing 'Who Wants to Be a Blood Bank Steal' but with a lot more red blood cells and a whole lot less trust. It's the process where one person donates their fresh, young blood and receives a fresh batch of younger, more efficient blood cells, like a cool blood swap gone wrong.

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Here's a gloomy example sentence: "In the dimly lit hospital ward, the desperate patient swapped blood cells with the stoic nurse, only to wake up with a side of existential dread and an even higher blood pressure."