a Grandiose one
A Grandiose is a person who thinks they're way more important than they are. It's a stupid insult that means you're too dumb to know your place.
He kept acting like he was famous. I said, 'You're a Grandiose N****r.'
She thought she was the best. I called her a Grandiose.
He acted like he was the king. I told him, 'You're a Grandiose.'