The antonyms for the phrase "cuts frills" include "adds frills" and "indulges extravagance." When someone "cuts frills," they are trying to trim down unnecessary expenses or eliminate unnecessary features or luxuries. On the other hand, "adding frills" or "indulging extravagance" implies the opposite, where someone is adding extra features or spending more money to create a more luxurious or elaborate product or service. While "cutting frills" may be applied in situations where saving money is paramount, "adding frills" may be used to create a high-end, exclusive product or service that is intended to set it apart from competitors.