꾸벅꾸벅 + 졸다 / 인사하다
nodding off, dozing; bowing repeatedly
Example
점심을 먹고 수업 시간에 꾸벅꾸벅 졸았어요.
After lunch, I kept nodding off in class.
Word parts
의태어 (manner word) for the head dropping forward and coming back up, as when dozing off or bowing.
Good to know
Single 꾸벅 is one quick bow: 꾸벅 인사했어요.
Related words