A side job, also known as a side hustle, is any form of work a person does outside their regular occupation to earn extra money. Some other synonyms for this phrase include supplementary job, second job, moonlighting, part-time job, freelance work, and gig economy. These terms all refer to the same concept of earning additional income while maintaining a primary source of employment. With the rise of the gig economy and the increasing availability of remote work, side jobs have become more accessible and flexible. They allow individuals to explore their passions, diversify their income streams, and gain new skills.