1to work a temporary or casual job
2(of students) to have a job outside of class time, or during vacation
Examples
zhōu mò周末wǒ我zài在chāo shì超市dǎ gōng打工。
周末我在超市打工。
I work part-time at the supermarket on weekends.
淑华说她明年想出国打工，结果被家人劝退。
Shu-hwa said she wanted to work abroad next year, but her family talked her out of it.