Reverse swing is a bowling technique in cricket where the ball moves in the opposite direction to what is expected, typically occurring when the ball is older and worn. This phenomenon is most effective with a dry, abrasive pitch and is often utilized by fast bowlers to deceive batsmen. The key to reverse swing lies in the condition of the ball; one side is kept shiny while the other side is rough. Bowlers like Wasim Akram and Shane Warne have mastered this skill, making it a crucial tactic in limited-overs and Test matches.