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A person so stuck up their own butt they think they’re the center of the universe and everyone else is just background noise.
My cousin is a Pac-A-Mac. He thinks he’s the best at everything and everyone else is just there to suffer.
She’s a Pac-A-Mac. She didn’t even notice the fire. She was too busy talking about her hair.
That guy is a Pac-A-Mac. He tried to explain the theory of relativity to a kid on the bus.