What does 팩폭 (paekpok) mean? Korean slang for a truth that hurts

Sunday evening, at the fridge, a mother asks her daughter: “So which diet of the year is this?” The daughter replies: “Mom, stop with the 팩폭.” The characters are invented, but every fact in their conversation has a source.

• Mom (54)팩폭? What's that? Something like 폭식, binge eating?
• Jiyoon (24)“Fact violence.” Hitting someone with the truth. What you just did.
• Mom (54)All I asked for was a number.
• Jiyoon (24)Exactly. It hurts more because you can't argue. Asia Economy defined it in 2016 as pointing out facts a person doesn't want exposed.
• Mom (54)2016, that's a while ago. Where does it come from?
• Jiyoon (24)Online sports communities. People used it sarcastically when their team got criticized. Namuwiki names an overseas-soccer forum as the first place. But who first said it, and when, isn't confirmed.
• Mom (54)In my day we called that 독설, venomous talk.
• Jiyoon (24)A professor said the same thing. Yang Yoon, a psychologist at Ewha Womans University, told that article it's like 독설 but more mainstream. The analysis: since attacking people outright causes trouble, people dress it up as fact.
• Mom (54)I wasn't attacking anyone.
• Jiyoon (24)A 25-year-old in that article said it can feel like a game, but it hurts in the comments. People often ask not because they don't know, but because they want comfort.
• Mom (54)So what do you call someone who does this?
• Jiyoon (24)팩력배, a “fact thug.” There's also 팩트폭격, “fact bombing.” These days people also say 뼈 맞았다, “took one to the bone.” Namuwiki says expressions like that took over the role after 2019.
• Mom (54)Got it. So which diet was it?
• Jiyoon (24)The fourth. This time it's real.

• "너 그 말 작년에도 했어." 이건 좀 팩폭인데“You said that last year too.” Okay, that's a bit of a 팩폭.To a friend sharing New Year's resolutions
• 후배한테 팩폭 맞았다. 내 PPT가 왜 긴지 다 설명하더라Took a 팩폭 from a junior. They explained exactly why my slides run long.Group chat, on the way home
• 팩폭은 사양할게. 오늘은 그냥 위로만 해 줘No 팩폭, please. Just comfort me today.The day of a failed interview
• 엄마의 팩폭은 늘 숫자로 시작한다Mom's 팩폭 always starts with a number.Weight, bank balance, diet count

It's two syllables, and it works for both the hitter and the hit. The bigger reason is that it comes with a built-in excuse: “I'm only stating a fact” makes an attack look like something else. Asia Economy made this point in 2016, citing comments like “you failed the interview because you're fat” as cases that turned into verbal abuse. Namuwiki also notes that facts without context easily become personal attacks. It sits at the opposite end from 뇌피셜 (“brain-official,” an unfounded claim), and it's a quick route to 현타 (a sudden reality check).

So: 팩폭 hurts more because it's true. Before using it, it's worth asking whether the other person really wanted an answer. Jiyoon's mom reportedly put a cake in the fridge that evening. Some 팩폭 doesn't need words. If you have a sharper definition, add it to the 팩폭 entry in the dictionary.