When push comes to shove is an idiomatic expression that indicates a time of difficulty or an obstacle that must be overcome. The phrase is often used to signal that a situation is critical and requires significant effort or action. Some synonyms for this phrase include "in a pinch," "when the rubber meets the road," "when things get tough," and "at the eleventh hour." These phrases all convey a similar sentiment of urgency and the need to act quickly or decisively in a difficult situation. By using these synonyms, speakers and writers can add variety to their language while still conveying the same meaning.