"On wagon" is an idiomatic phrase that typically refers to an individual who has committed to sobriety or a particular diet. Synonyms for this expression include "abstinent," "sober," "temperate," "clean," "clear," or "restricted." Comparable terms for "on wagon" in the realm of sobriety are "in recovery," "sober-minded," and "in treatment," while analogous terms for a particular diet could be "eating clean," "actively dieting," or "following a specific food plan." No matter the context, these words encapsulate the idea of dedication, discipline, and self-restraint, highlighting the strength and determination required to commit to such a regimen.