뇌정지 (noejeongji) — my mind went blank.
Lesson 19 in our Korean Slang series, adapted from Korean Your Teacher Doesn’t Teach You by Injin Hwang.
What 뇌정지 means
뇌 means brain and 정지 means stop. 뇌정지 왔다 humorously describes freezing for a moment because of surprise, pressure or confusion. It is an exaggeration, not a medical diagnosis.
A short conversation
A: 갑자기 질문받았을 때 어땠어?
B: 완전 뇌정지 왔어.
A: What happened when you were suddenly asked a question?
B: My mind went completely blank.
How to understand it
Start with the context in the dialogue. The speaker uses 뇌정지 to mean “my mind went blank.” A word-for-word reading can miss the tone. Compare the Korean lines with the natural English translation, and notice which part of the situation makes the meaning clear.
Use it with care
Use it for everyday awkward moments, not for a person’s real medical symptoms.
A more neutral or polite alternative:
순간 무슨 말을 해야 할지 몰랐어요.
For a moment I did not know what to say.
Try it yourself
Did the speaker’s brain literally stop?
Show the answer
No. They could not think of an answer for a moment.
Read the conversation aloud, then try the neutral alternative. Think about which one fits a friend and which one fits a polite conversation.
Based on the author’s slang collection, with additional learning notes. AI-generated illustration created for this lesson.
