A serial hustler can be defined as someone who is constantly on the move, looking for new opportunities and ways to make money. They may be adept at selling goods or services, networking with others, and finding ways to monetize their talents and skills. Synonyms for this term could include a "professional go-getter," "perennial entrepreneur," or "career opportunist." Other possible phrases might include a "persistent self-starter," "savvy risk-taker," or "resourceful profit-seeker." Regardless of the term used, the idea is that a serial hustler is someone who is always looking for ways to advance their career, start new ventures, and make a name for themselves in their chosen field.