"All or nothing" is a phrase that indicates a situation where there are no middle grounds. It means that there is either total success or complete failure. There are several synonyms for this phrase, such as "win or lose," "succeed or fail," "do or die," and "sink or swim." These phrases express the same idea that a person either achieves great success or fails miserably, with no in-between. In the business world, "make-or-break" is another phrase used to represent this situation. No matter which phrase one uses, it's clear that all these expressions represent the high stakes and pressure of achieving success.