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B-Mac(ing) is when someone thinks they're the only genius in the room and everyone else is an idiot. They talk like they know everything, but it's usually total garbage.
I said the sky is blue. He said it's purple and made of glitter. I asked him why. He said I'm dumb.
He told me I was wrong about the math problem. I said I was right. He said I was wrong. I said he was wrong. He said I was wrong.
He posted a tweet saying the moon was made of cheese. I replied with a picture of a moon and a question mark. He blocked me.