"Went legit" is a colloquial expression that refers to when someone turns their back on illegitimate activities and becomes a law-abiding citizen. There are several synonyms for this phrase that can be used in various contexts. Some possible alternatives include "reformed," "mended one's ways," "turned over a new leaf," "changed course," "transformed from a life of crime," "gone straight," or "rehabilitated." Each of these phrases conveys the idea of moving away from a life of wrongdoing and taking positive steps towards a lawful and socially acceptable lifestyle. These synonyms can be used interchangeably depending on the specific situation and tone of the communication.