The phrase "makes a pig of" refers to the act of indulging in excessive or gluttonous behavior, often in relation to food. Antonyms for this phrase might include terms that connote self-control, such as "moderate," "restrain," or "abstain." Other antonyms could touch on the opposite of indulging, such as "fast," "detox," or "cleanse." Emphasizing the opposite of greed and overindulgence, we might look to phrases such as "practice restraint," "hold back," or "be mindful." Overall, choosing a form of antonym that emphasizes control or health can help move away from the negative behavior associated with making a pig of oneself.