In American football, a quarterback is the player who leads the team's offense and throws most of the passes. The quarterback stands behind the center at the start of each play, receives the ball, and then decides whether to throw it to a teammate, hand it off to a running back, or sometimes run with it.

Quarterbacks need to make split-second decisions while huge defensive players rush toward them. They study playbooks full of complex strategies, memorize each teammate's role, and adjust plans based on what the defense is doing. Great quarterbacks like Joe Montana, Tom Brady, and Patrick Mahomes become famous because the position demands intelligence, courage, accuracy, and leadership all at once.

Because the quarterback handles the ball on almost every offensive play and makes so many crucial decisions, people often use quarterback as a verb meaning to lead or direct something. A student might quarterback a group project, or a manager might quarterback an important business initiative. The word suggests someone taking charge and coordinating everyone else's efforts toward a common goal.