"Break bad" is an idiomatic expression that means to start behaving badly or engaging in criminal activities. There are various synonyms for this phrase, such as "go rogue," "go astray," "turn delinquent," "fall from grace," "turn to crime," "go corrupt," and "go rogue." When someone breaks bad, they start to behave in a way that is not acceptable in society. The phrase is most often used to describe someone who was previously respectable but has now turned to bad behavior. Regardless of what words you use, the meaning stays the same, which is that someone has started acting in a way they shouldn't be.