Jumped on is a phrasal verb that means to take action against or get involved in something. There are several synonyms for this phrase, including tackled, confronted, addressed, challenged, engaged, and intervened. Tackled is used when you intervene in a physical altercation, confronted when you face a person with a problem, addressed when you speak up about something important, challenged when you question or oppose an idea, engaged when you become involved in a project or situation, and intervened when you take action to stop a harmful situation. These synonyms can be used interchangeably based on the context and tone of the conversation, making your language more versatile and expressive.