streaker
noun [ C ] uk/ˈstriː.kər/ us/ˈstriː.kɚ/
（在公共场所）裸奔者
a person who runs naked through a public place in order to attract attention or to express strong disapproval of something
The game was interrupted when two streakers ran onto the field with a banner. 两个裸奔者拿着个横幅跑进赛场，比赛被迫中断。