Fa Sho
A loud, exaggerated way of agreeing that makes everyone else feel like they're in the background.
He said the pizza was good. Fa Show! I ate it, I loved it, I'm now in the hospital from heartburn.
She said she'd do it. Fa Show! She did it, and then she did it again just for fun.
He said he'd win. Fa Show! He won, and then he insulted everyone at the party.