The phrase "two-hitter" is slang for a game in baseball where a pitcher allows only two hits to the opposing team. Synonyms for this term include "double dip", "two-bagger", "two-hit shutout", "two-hit gem" and "two-hit masterpiece". These terms all refer to the same achievement, and the differences merely reflect personal preferences and regional dialects. Some baseball fans may use these synonyms interchangeably, while others may prefer a particular term over others. Regardless of what you call it, a two-hitter is a significant accomplishment for any pitcher, and it often leads to a victory for their team.