Once upon a time, there lived 6 chickens. They were bored of their normal livestyles and came up with the 'Pecking' tournament. During the tournament, chicken A dominated all other chickens with its bankai 'peck peck' to emerge victorious. Professor fishbreak witnessed the tournament and decided to name this chicken the 'KING CHICKEN'. That was how the term was born.
So, the name 'king chicken' lived on and haunted countless students who took up H3 Mathematics.