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A fancy French way of saying 'bunda' that makes you sound like a genius, but you’re really just making up nonsense to hide how dumb you are.
Labunda? Please. You’re just trying to impress the kid in the back of the bus.
Labundalakaka? That’s not a word. That’s just you yelling at a calculator.
Labunda is just your excuse for why you failed math again.