on the side
idiomPart ofside
on the side — idiom
1. in addition to your main job or activity, often to earn extra money or to do som
1.idiom
Definition
in addition to your main job or activity, often to earn extra money or to do something in a less official way
Example
Benjamin works as a graphic designer on the side while studying at university.
The chef makes wedding cakes on the side for friends and family members.