What is the definition of Graduates Blood Cells?

"Graduates blood cells? Ha! Think of it as the blood relatives of our once-proud, high-achieving students who just decided to take a sip at the 'Blood Bank of Life.' They're the ultimate 'Graduation Party Blood Donors,' turning out all those crimson cells with such gusto, they could make a college graduation party look like a blood spatter show!"

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And here's an edgy example sentence: "The newly graduated blood cells of the 'Underground Medical Society' were so eager to make a difference that they decided to donate their own 'blood' to the city's homeless population, inadvertently causing a 'plash of crimson' in their own life cycle."