祕撈 moonlight

秘[bei3]撈[laau4/lou1], 指瞞著僱主, 從事兼職的意思。

Moonlight means "to work at an extra job, especially without telling your main employer" Cambridge Dictionary

(動詞 verb) moonlight

(名詞 noun) moonlighter

Examples:

Besides the full time job, she moonlights as a waitress at weekends.