What is the definition of Checking Math?

"Checking math" is like the ultimate existential dread in a calculator. Imagine if your trusty sidekick, the calculator, started giving you existential questions instead of just adding and subtracting. You'd feel like you're stuck in an endless loop of 'Is this the end?', 'Did I just make a mistake that'll cost me my soul?' and 'Is my life just a series of zeroes?'

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Here's an edgy example sentence using it: "After years of checking math, the universe decided to send me a cosmic 'checking math' - it was like the stars decided to drop a stern look and say, 'You're not as smart as you think you are.'"