The phrase "what one has coming" typically refers to the consequences or results that someone will receive as a result of their actions or decisions. Synonyms for this phrase may include "just deserts," "karma," "retribution," "penalty," "payback," "poetic justice," or "comeuppance." Each of these terms implies a sense of action and consequence, often with a moral or ethical dimension. Whether used in a serious or lighthearted context, these synonyms reflect the idea that our actions have consequences, and that we are ultimately responsible for what we sow and reap in life.