LBW stands for Leg Before Wicket. It is a mode of dismissal in cricket where a batsman is declared out if a ball delivered by the bowler strikes any part of the batsman's body (usually the legs) before hitting the bat, and the umpire believes the ball would have hit the stumps.
The decision for LBW is based on several factors, such as the line of the ball, whether the batsman attempted a shot, and the impact of the ball on the pads.