The phrase "hit the jackpot" typically refers to experiencing a great success or attainment of a large financial gain. There are a variety of synonyms that can be used in place of this phrase, such as "strike it rich," "score big," "win big," "hit paydirt," "hit the motherlode," or "strike gold." Each of these phrases conveys the idea of achieving a significant accomplishment or reward. Other related idioms may include "hit the bullseye," "hit the nail on the head," or "strike while the iron is hot," all of which imply achieving a favorable outcome through skill, timing, or good fortune.