Meaning:
“网课” means “online class,” and “爆破” means “bombing.” As the COVID pandemic forced many students to move from classrooms on campus to online spaces, students and teachers have been more open to the risk of cyberattacks. “Online class bombing,” commonly known as “Zoombombing” in countries where the video platform Zoom is used for online teaching, is a form of cyber attack where attackers enter a classroom and expose students and teachers to body-shaming, slurs, racism, loud music or pornography. The phenomenon caught people’s attention after a woman teacher in Henan Province died of a heart attack in late October allegedly due to a traumatic Zoombombing experience.
Example:
A: 听说你们班线上数学课出了问题？
Tīngshuō nǐmenbān xiànshàng shùxuékè chūle wèntí？
Was it true that something went wrong during your online math class?
B: 是的，不知道谁泄露了课堂信息，遇到了网课爆破，有人进课堂放很大声的音乐。
Shìde ，bù zhīdào shuí xièlòu le kètáng xìnxī，yùdào le wǎngkè bàopò，yǒurén jìn kètáng fàng hěn dàshēng de yīnyuè。
Yeah. We have no idea who leaked the information of our math class, leading to a Zoombombing. Someone entered our classroom and played very loud music.