on the side
1. in addition to your main job 兼職/副業
● He is a mechanic who buys and sells cars on the side.
2. secretly 秘密地
● She's married but she has a lover on the side.
● You are the side chick. 你是地下情人
3. (of food in a restaurant) served on another plate, or not on part of the meal 附餐/配菜
● Would you like a baked potato on the side?
