There are plenty of synonyms for the phrase "don't buy" that can be used to express disapproval or caution when it comes to making a purchase. Some similar phrases include "avoid purchasing," "refrain from buying," "hold off on buying," "steer clear of purchasing," and "resist the urge to buy." Other words that convey a similar sentiment include "boycott," "shun," "reject," "discard," "skip," "forfeit," and "eschew." By utilizing these synonyms, individuals can communicate their feelings about a product or service without using the same phrase repeatedly, bringing a greater degree of nuance and precision to their language.