An action in baseball in which the current batter aggressively advances towards the pitcher's mound in response to perceived malicious intent by the pitcher.
In most cases a batter charges the mound after being hit or nearly hit by a pitch. Usually this occurs at the climax of a particularly tension-filled game. One or both teams may have pitchers who have already hit batters (unintentionally or intentionally). When teams haven't been hitting each other with pitches, it's usually a case of a close play or a bad call that increases tension between the teams. In either case, a batter will typically charge the mound at a run towards the pitcher, at which point team members on the field get involved, followed by a general clearing of both dugout benches. After a game with this sort of physical conflict, the guilty parties involved usually will receive fines and/or suspensions.