1. What does it mean?
팩폭 abbreviates expressions such as 팩트 폭력 or 팩트 폭격. It describes a pointed observation that seems to hit someone's weak spot, especially when the listener cannot easily deny it.
Also written or said as 팩트폭행, paekpok
2. The nuance
Calling a remark 팩폭 does not establish that it is true. The term can celebrate wit, but it can also excuse needless cruelty; factual accuracy and considerate delivery are separate issues.
3. Examples
“계획표만 예쁘게 만든다는 동생 말에 팩폭 맞았어.”
My sibling hit me with the painful truth that I only make pretty schedules.
“친구가 팩폭이라고 해도 외모 비하는 농담으로 안 들려.”
Even if a friend calls it a truth bomb, mocking someone's looks doesn't sound like a joke.
Sources
References support the meaning and usage. Example sentences are written for NoCapWiki.