벼락치기 (byeorakchigi) — The Korean Word You'll Hear Most the Night Before an Exam

벼락치기

벼락치기 (byeorakchigi) is the word for not preparing in advance and then, once the thing is right in front of your nose, rushing to get it all done at once. The exam is at nine tomorrow morning and you’re opening the first page of the textbook at eleven tonight. The presentation is the day after tomorrow and you’re making the slides at 3 a.m. The wedding is a month away and you start skipping meals today. Korean has a single word for what all of these people are doing.

The temperature of this word is close to self-mockery — 자조 (jajo, 自嘲). It isn’t a boast, and it isn’t a serious accusation either. When someone says “나 어제 벼락치기했어” (Na eoje byeorakchigihaesseo) — “I crammed last night” — the speaker is admitting they didn’t prepare, but confessing it with a laugh. That’s why the word sounds most natural attached to the first person. Attach it to someone else’s work, and it turns sharp in an instant. “이거 벼락치기로 하신 거죠?” (Igeo byeorakchigiro hasin geojyo?) — “You just threw this together, didn’t you?” — lands almost exactly like “성의가 없네요” (Seongui-ga eomneyo), “you didn’t put any care into this.” Same word, but whether the subject is me or you decides whether it’s a joke or a rudeness. That’s precisely the spot learners tend to miss.

One more thing. 벼락치기 points at timing, not speed. Doing something quickly doesn’t make it 벼락치기; not doing it at all and then starting right before the deadline does. So if someone has studied every day for a month and then stays up the night before the exam, that isn’t 벼락치기 — it’s just 막판 정리 (makpan jeongni), “final review.”

Checking it in the National Institute of Korean Language dictionary

First, let’s look exactly as it is at how the Basic Korean Dictionary, published by the national body 국립국어원 (the National Institute of Korean Language), spells this word out.

벼락치기 (byeorakchigi) 「명사」 (noun) 미리 준비하지 않고 일을 앞두고 서둘러서 하는 것. (Miri junbihaji anko ireul apdugo seodulleoseo haneun geot.) Doing something in a hurry right before it is due, without having prepared in advance. [en] hasty preparation; hurried job — A hurried preparation just before an event, after having done very little in advance. [ja] いちやづけ【一夜漬け】 — 前もって準備せず、急いですること。 [es] preparación en el último momento, preparación apresurada — Acción de prepararse apresuradamente para algo que se avecina sin haber prevenido. [zh] 临时突击，临阵磨枪，临时抱佛脚 — 不提前准备，事情到了眼前才匆匆忙忙去做。 — National Institute of Korean Language, Basic Korean Dictionary (krdict.korean.go.kr)

The part of the definition worth noticing is the opening phrase, “미리 준비하지 않고” (miri junbihaji anko), “without preparing in advance.” The dictionary, too, leads with the absence of preparation rather than with speed. For reference, this dictionary carries no Portuguese translation, so here is one of our own — preparação de última hora (our translation).

Now let’s look at the dictionary’s actual usage examples, exactly as written, and work out what situation each one comes from.

민준이가 내일까지 내야 하는 과제 벼락치기를 하고 있더라. (Minjuniga naeilkkaji naeya haneun gwaje byeorakchigireul hago itdeora.) I saw Minjun cramming on an assignment that’s due tomorrow. — National Institute of Korean Language, Basic Korean Dictionary (krdict.korean.go.kr)

This is a third party passing along what they witnessed: a friend only now wrestling with an assignment due tomorrow. Thanks to the ending “-더라” (-deora), it isn’t criticism but a light eyewitness report — “so I saw this thing, right.” This is the slot 벼락치기 occupies most often in real conversation.

아직 일주일이나 남았잖아요. 벼락치기하기에는 충분해요. (Ajik iljuirina namatjanhayo. Byeorakchigihagieneun chungbunhaeyo.) There’s still a whole week left. That’s plenty of time to cram. — National Institute of Korean Language, Basic Korean Dictionary (krdict.korean.go.kr)

A joke. A week is short for preparing properly but generous for cramming — the speaker knows their own habits and is laughing them off. This single sentence shows the self-mocking temperature of 벼락치기 perfectly.

그녀는 결혼식 때 아름다운 신부가 되기 위해 결혼을 한 달 앞두고 벼락치기 다이어트를 시작했다. (Geunyeoneun gyeolhonsik ttae areumdaun sinbuga doegi wihae gyeolhoneul han dal apdugo byeorakchigi daieoteureul sijakhaetda.) To be a beautiful bride at her wedding, she started a crash diet a month before the ceremony. — National Institute of Korean Language, Basic Korean Dictionary (krdict.korean.go.kr)

Proof that 벼락치기 isn’t a word reserved for studying. As in 벼락치기 다이어트 (byeorakchigi daieoteu), “crash diet,” you can attach a noun directly after it to build “a rushed, crammed-in ○○.” 벼락치기 청소 (byeorakchigi cheongso), “a frantic last-minute cleaning,” and 벼락치기 연습 (byeorakchigi yeonseup), “a rushed practice session,” work the same way.

고등학교 때 중간고사나 기말고사가 다가오면 어김없이 벼락치기 공부를 했던 기억이 있다. (Godeunghakgyo ttae junggangosana gimalgosaga dagaomyeon eogimeopsi byeorakchigi gongbureul haetdeon gieogi itda.) I remember that back in high school, whenever midterms or finals came around, I would cram without fail. — National Institute of Korean Language, Basic Korean Dictionary (krdict.korean.go.kr)

A sentence recalling a memory nearly every Korean person shares. The fun part is the adverb “어김없이” (eogimeopsi), “without fail” — it means regretting it every single time and then doing exactly the same thing every single time.

벼락치기를 하면 당장의 성적은 유지할 수 있어도 결국엔 남는 게 없어요. (Byeorakchigireul hamyeon dangjangui seongjeogeun yujihal su isseodo gyeolgugen namneun ge eopseoyo.) Cramming may keep your grades up for the moment, but in the end nothing stays with you. — National Institute of Korean Language, Basic Korean Dictionary (krdict.korean.go.kr)

This one sits in the slot of advice or a gentle lecture. It names the effect and the limit of 벼락치기 in the same breath. The reason the word is neither wholly negative nor wholly positive in Korea is contained in this sentence.

Seeing it in a real conversation

Situation: eleven at night, the day before a certification exam. Two people run into each other at the coffee vending machine in the hallway of a 24-hour study café.

Jun-kyung: 어? 너 여기서 뭐 해. 시험 내일 아침 아니야? Huh? What are you doing here? Isn’t your exam tomorrow morning?

Emily: 그러니까 여기 있지. 나 지금 벼락치기 중이야. That’s exactly why I’m here. I’m cramming right now.

Jun-kyung: 한 달 전부터 준비한다며. 계획표까지 보여 줬잖아. You said you’d been preparing for a month. You even showed me your study plan.

Emily: 그건 계획이었고. 실행은 오늘부터야. That was the plan. The execution starts today.

Jun-kyung: (웃음) 커피 뽑아 줄게. 근데 하룻밤 벼락치기로 되겠어? (laughs) I’ll get you a coffee. But will one night of cramming really do it?

Emily: 몰라. 안 되면 다음 회차 있잖아. 그땐 진짜 벼락치기 안 해. I don’t know. If it doesn’t work, there’s the next round. Next time I really won’t cram.

Using it this way sounds off

✗ (Handing a report to your team lead) 팀장님, 이거 어제 벼락치기로 만들었습니다. (Timjangnim, igeo eoje byeorakchigiro mandeuretseumnida.) — Boss, I threw this together last night. ✓ (To your team lead) 시간이 촉박해서 급하게 정리했습니다. 부족한 부분은 보완하겠습니다. (Sigani chokbakhaeseo geuphage jeongnihaetseumnida. Bujokhan bubuneun bowanhagetseumnida.) — Time was tight, so I pulled it together quickly. I’ll fill in whatever is missing. → 벼락치기 is a way of admitting with a smile, “I didn’t prepare in advance.” Among friends that reads as honesty, but in front of the person receiving your work it becomes you running your own work down. With someone senior to you, it’s safer to state the facts plainly and leave it there.

✗ (After a colleague’s presentation) 발표 좋았어요. 벼락치기로 하신 거죠? (Balpyo joasseoyo. Byeorakchigiro hasin geojyo?) — Great presentation. You crammed for it, didn’t you? ✓ (To a colleague) 발표 좋았어요. 짧은 시간에 준비하신 거 맞죠? 대단하시네요. (Balpyo joasseoyo. Jjalbeun sigane junbihasin geo matjyo? Daedanhasineyo.) — Great presentation. You put it together in a short time, right? That’s impressive. → Even if you open like it’s a compliment, the moment you attach 벼락치기 to someone else it flips into a verdict: “you didn’t put any care into it.” This word is safest when you aim it at yourself.

Example sentences by situation

① Confessing to a friend after bombing an exam

나 이번 시험 완전 벼락치기로 준비했어. 어제 하루에 여섯 챕터 봤잖아. (na ibeon siheom wanjeon byeorakchigiro junbihaesseo. eoje harue yeoseot chaepteo bwatjanha.) I totally crammed for this exam. I got through six chapters in one day yesterday.

“완전 (wanjeon),” “totally,” is an adverb younger speakers reach for constantly for emphasis. Adding one sentence of evidence afterward makes the self-mockery far more vivid.

② When the rush job shows

벼락치기로 만든 자료라 오타가 다섯 개나 나왔다. (byeorakchigiro mandeun jaryora otaga daseot gaena nawatda.) Since I threw the materials together at the last minute, five typos turned up.

The pattern “벼락치기로 만든 / 쓴 / 준비한 + noun” — “the ○○ I threw together / wrote / prepared at the last minute” — is an extremely common way to apologize for the quality of your work before anyone else can.

③ Talking someone out of it

벼락치기하지 말고 오늘부터 하루에 열 장씩 하자. (byeorakchigihaji malgo oneulbuteo harue yeol jangssik haja.) Let’s not cram — let’s do ten pages a day starting today.

This is 벼락치기하다 (byeorakchigihada), the noun plus “-하다.” Used with the negative command “-지 말고” (-ji malgo), “don’t ~, and instead…,” it comes across as a suggestion rather than nagging.

Politeness levels and similar expressions

Since 벼락치기 is a noun, the politeness is carried by the verb that follows. Casual speech gives you 벼락치기했어 (byeorakchigihaesseo), everyday polite speech 벼락치기했어요 (byeorakchigihaesseoyo), and formal speech 벼락치기로 준비했습니다 (byeorakchigiro junbihaetseumnida). Just remember, as we saw above, that formal settings are usually not settings for this word at all.

Expression	Tone & intensity	Where it belongs
벼락치기 (byeorakchigi)	Self-mocking and light; admits a lack of preparation	With peers, about yourself. Attached to someone else’s work, it’s a put-down
밤새우다 (bamsaeuda) — “to stay up all night”	Neutral. Speaks to the amount of effort put in	Anywhere. Fine even with people senior to you
막판 스퍼트 (makpan seupeoteu) — “final spurt”	Positive, full of energy	The last push from someone who’s been at it steadily
발등에 불이 떨어지다 (baldeunge buri tteoreojida) — “fire has fallen on your feet”	Emphasizes urgency	An idiom for describing a situation; works well in writing too
급조하다 (geupjohada) — “to knock together hastily”	Negative and stiff	Written style: reports, news articles. Used of organizations, facilities, materials

The pair in the table that confuses people most is 벼락치기 and 막판 스퍼트. Both are stories about the moment right before a deadline, but what came before that moment is the exact opposite. Nothing done beforehand: 벼락치기. Kept at it all along: 막판 스퍼트.

Cultural background — studying that falls from the sky

The way this word is built is a picture in itself. 벼락 (byeorak) is a lightning bolt flashing down out of the sky, and 치기 (chigi) comes from 치다 (chida), “to strike.” Lightning falls without warning, in the briefest instant, all concentrated on one spot — it’s hard to find a better image for pouring several days’ worth of studying into a single night. Korean has a whole family of words that use 벼락 to mean “suddenly and all at once”: 벼락부자 (byeorakbuja), “an overnight fortune,” and 벼락출세 (byeorakchulse), “a meteoric rise.” 벼락치기 is one of that family.

It gets more interesting when you compare which image other languages grabbed for the same situation. According to the translations in the dictionary above, Japanese has 一夜漬け (ichiyazuke), “one-night pickling” — a kitchen image of vegetables that need a long soak being pickled overnight instead. One of the Chinese translations, 临时抱佛脚, means grabbing the Buddha’s feet only once things get urgent. Korea looks to the lightning in the sky, Japan to the pickling crock in the kitchen, China to the Buddha statue in the temple — three countries looking at completely different places to describe the same all-nighter.

There’s a reason this word is heard so often in Korea. Midterms, finals, the 수능 (suneung, the national college entrance exam), certification exams of every kind — tests that are settled on one fixed date sit at every joint of life here. When exam season arrives, 24-hour study cafés and convenience-store coffee shelves get crowded, and dramas and variety shows reliably serve up scenes of someone stacking workbooks and staying up all night. In those scenes, a character vowing “이번엔 진짜 미리 할 거야” (Ibeonen jinjja miri hal geoya), “this time I’m really going to do it in advance,” and then pulling the exact same all-nighter in the next episode is close to a cliché. So the word carries regret and affection at once. Bring up 벼락치기 with a Korean person and their own story usually follows immediately — as conversation-openers go, few words work better.

Today’s quiz

Emily has been preparing for the Korean language proficiency exam one hour a day for the past three months. Two days before the test, she stayed up all night doing one final review of the grammar. Which sentence describes this situation most naturally?

에밀리는 벼락치기로 시험을 준비했다. (Emillineun byeorakchigiro siheomeul junbihaetda.)
에밀리는 시험 이틀 전 막판 스퍼트를 했다. (Emillineun siheom iteul jeon makpan seupeoteureul haetda.)
에밀리는 시험 자료를 급조했다. (Emillineun siheom jaryoreul geupjohaetda.)

Show the answer

Answer: 2

벼락치기 is for when you don’t prepare in advance and start right before the deadline. Emily kept at it steadily for three months, so option 1 doesn’t fit. The 급조하다 in option 3 is a stiff word for hastily manufacturing something that didn’t exist before, which doesn’t suit studying. Someone who has worked steadily and then poured on the power at the end is doing a 막판 스퍼트 — that’s the answer.

Definitions and example sentences are from the National Institute of Korean Language’s Basic Korean Dictionary (krdict.korean.go.kr); that portion of this post, including our translations, is licensed under CC BY-SA 2.0 KR.