side gig

noun1

1. •
   (slang) A gig (temporary or informal job) being done on the side; a person's non-primary job or other occupation, often distinguished by factors such as formality, legality, personal priority, and/or financial return.

   • I work in retail, but I also have a side gig as a content creator.
   • Sure, I do commercial and sponsored things, but those are just side gigs. Acting on the big screen will always be my passion.