When someone "gives it all", it means they are putting all their effort, energy, and dedication into something. There are several synonyms for this phrase, such as "putting everything into it", "going for broke", "putting your heart and soul into it", "giving 110%", "leaving it all on the field", "exhausting all possibilities", and "pouring your heart out". These phrases indicate a level of commitment that goes beyond just doing your best. They communicate that the person is fully invested in achieving their goal or completing their task. Using these synonyms can add variety and depth to your language and convey a sense of passion and intensity.