破防

pòfáng

Literally says

the defense is broken

Actually means

emotionally hit so hard your walls come down

When to say it

From gaming, where you smash an enemy's armor. Now for moments that crack your emotional shell. A kind message when you were holding it together, a video of a dad waiting at the station, pòfáng le. Often said with wet eyes and a laugh.

Hear it in the wild

看到妈妈的留言,我破防了。

Kàndào māma de liúyán, wǒ pòfáng le.

Seeing mom's message completely broke me.

这电影最后十分钟直接破防。

Zhè diànyǐng zuìhòu shí fēnzhōng zhíjiē pòfáng.

The last ten minutes of this film wrecked me.