Macronrhizyvac - Making up a word just to sound cool, even though no one know

Making up a word just to sound cool, even though no one knows what it means and it probably doesn’t even make sense

He called his new pizza ‘Macronrhizyvac’ and now it’s the most expensive pizza in town.

My crush said Macronrhizyvac and I thought he was a genius. He was just trying to impress me.

My dog learned Macronrhizyvac and now it barks it every time I leave.