Note the reading: 活 here is huó with a rising tone (meaning 'work / job / task'), not the more familiar huó 'alive'. Common verb pairings: 干杂活 'do odd jobs', 打杂 'to do miscellaneous work'. 打杂 is the related noun for the person doing the chores.
register
Colloquial - describes the unglamorous, scattered tasks given to interns, junior employees, household helpers, or movie set assistants. Slightly self-deprecating when used about one's own work.
