a Grandiose one
Being called a Grandiose means you're too full of yourself. It's not about being grand or your race. It's just a rude way to shut you down.
He took credit for everyone's work. I told him, 'You're a Grandiose.'
She said she'd win the game. I said, 'You're a Grandiose N****r.'
He acted like he was the best. I called him a Grandiose.