The phrase "gat on the wagon" refers to abstaining from alcohol or other vices. Synonyms for this phrase could include "getting sober," "cleaning up," or "getting on the straight and narrow." Other similar phrases might be "going teetotal," "swearing off," or "going cold-turkey." All of these phrases indicate a commitment to a healthier lifestyle and a decision to say no to harmful habits. Whether it's a personal choice or a necessary step for professional or legal reasons, "gat on the wagon" and its synonyms reflect a positive choice towards self-improvement and a better life.