In American football, a pass deflected, also known as a pass deflection, a pass defended, a pass defensed, a pass knockdown, or a pass breakup, is an incomplete pass that is caused by a defensive player. This is done by slapping or blocking the ball with a hand or part of the arm, knocking the ball to the ground.
This very rarely happens in football and is generally considered a grand gesture and/or a distinguished honor for a player to claim a pass deflected in his football career.