moonlighting
nounUK /ˈmuːnlaɪtɪŋ/
US /ˈmuːnlaɪtɪŋ/
Moonlighting is doing a second job at night after your main job.
He earns extra money through moonlighting as a taxi driver.
OTHER MEANINGS
2. Working secretly at a second job, often without telling your main employer.
The company fired him for moonlighting at a rival firm.
3. In British English, working a second job without paying the proper tax on that income.
The inspector was accused of moonlighting to avoid tax.
4. The act of shining or appearing in the light of the moon.
The moonlighting on the lake made the night look magical.