on the side
成語所屬單字side
on the side — 慣用語
1. in addition to your main job or activity, often to earn extra money or to do som
1.慣用語
釋義
副業；兼差
in addition to your main job or activity, often to earn extra money or to do something in a less official way
例句
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.