闹事 (nào shì): 문제를 일으키다.

Yesterday a few drunk customers caused trouble in the bar, so the owner had no choice but to call the police.

After the match, some fans of the losing team caused trouble outside the stadium, throwing bottles at the police, and were taken away as a result.

During class, that boy deliberately talked loudly and threw paper balls; the teacher told him not to disturb others, but he continued to cause trouble, and was finally asked to leave the classroom.