Sweat it out is a common idiom used to mean working hard or exerting oneself to achieve a desired outcome. Synonyms for this phrase could include phrases such as "putting in the work," "grinding it out," "putting your nose to the grindstone," or "hunkering down." Other alternatives to this phrase could include "buckling down," "digging deep," or "giving it your all." Whether you are studying for exams, putting in extra hours at work, or working towards a personal goal, it's important to stay focused and determined, and finding the right phrase to motivate you can make a big difference in your success.