F.K.I.A.
A person who talks too much and thinks they’re the only one who’s ever been right.
My brother F. K. I. A. talked for an hour about why pizza is the best food ever.
My F. K. I. A. teacher explained the whole solar system just to correct me for one mistake.
My F. K. I. A. friend told me the whole story of the Titanic just to show me he was right.