F.U.F.B.
A guy who thinks he’s a genius because he got a C and still thinks he’s the best.
He’s a F. U. F. B. He got a C and still thinks he’s the top dog.
That F. U. F. B. thinks he’s smart and everyone else is dumb.
He called me a F. U. F. B. because I got an A and he got a C.